The journey begins. Don’t expect me to hold your hand through this.

1804–1806 American Expedition

When one speaks of “Lewis and Clark,” the minds of most individuals, if they recall anything at all, usually drift toward the intrepid leaders of this particular undertaking. However, for those who require a more precise designation, one might refer to Meriwether Lewis and William Clark individually. For the truly lost, there’s always the broader expanse of Lewis and Clark (disambiguation) .

Lewis and Clark Expedition

Portraits of Meriwether Lewis and William Clark

Route of expedition with modern borders

The Lewis and Clark Expedition , more formally recognized as the Corps of Discovery Expedition , marked a pivotal moment in the nascent history of the United States. It was the nation’s inaugural venture to traverse the vast, enigmatic western expanse recently acquired through the momentous Louisiana Purchase of 1803. This endeavor was not undertaken by seasoned explorers of global repute, but by a carefully chosen cadre of U.S. Army personnel and civilian volunteers. At their helm were Captain Meriwether Lewis and his trusted comrade, Second Lieutenant William Clark , a partnership that would etch itself into the annals of American exploration.

The expedition’s laborious journey commenced on May 14, 1804, with Clark, accompanied by approximately 30 individuals, departing from Camp Dubois (also known as Camp Wood) in Illinois . Their initial course led them up the formidable Missouri River . A few days later, they converged with Lewis and the remaining ten members of the group in St. Charles, Missouri . From this point, the unified Corps of Discovery pressed deeper into the unexplored continent, continuing their ascent against the current of the Missouri. They navigated across the imposing Continental Divide of the Americas near the challenging Lemhi Pass , a geographical barrier that tested their resolve and resources. Their persistence eventually brought them to the waters of the Columbia River , which then guided them westward until, in 1805, they finally glimpsed the boundless expanse of the Pacific Ocean —a sight few non-indigenous people had ever witnessed from this vantage point.

The return leg of this monumental voyage began on March 23, 1806, from their winter encampment at Fort Clatsop in what is now Oregon . After six arduous months retracing much of their path, the expedition concluded its epic journey on September 23, 1806, having covered thousands of miles and endured countless hardships.

This ambitious expedition was personally commissioned by President Thomas Jefferson , who, immediately following the Louisiana Purchase of 1803, recognized the imperative to thoroughly survey and document the immense new territory. Beyond mere cartography, Jefferson harbored a fervent desire to uncover a practical, all-water travel route across the western half of the continent, specifically one that would circumvent the notoriously arid and desolate desert regions of the southwest . Crucially, he aimed to firmly establish an American presence in these newly acquired lands, preempting any attempts by rival European powers to stake their own claims. The expedition’s secondary objectives were equally ambitious, encompassing a broad spectrum of scientific, economic, and even what Jefferson optimistically framed as “humanitarian” goals. This included the meticulous documentation of the West’s astonishing biodiversity , its intricate topography , and its overarching geography . Furthermore, the expedition was tasked with initiating positive trade relations with the myriad of (potentially unknown) Native American tribes inhabiting these vast territories. Upon their return to St. Louis , the Corps delivered their findings to President Jefferson, presenting a wealth of information in the form of detailed maps, intricate sketches, and extensive journals that would forever alter the understanding of the American West.

Motivations

One of President Thomas Jefferson ’s primary and most enduring objectives for the expedition was to locate “the most direct and practicable water communication across this continent, for the purposes of commerce.” This wasn’t merely a romantic notion of discovery; it was a pragmatic vision of an economic artery that would connect the burgeoning American economy to the lucrative markets of Asia, bypassing the lengthy and often perilous sea routes. The idea of a “Northwest Passage,” albeit an inland one, had captivated explorers for centuries, and Jefferson believed this expedition might finally unlock that elusive path.

Beyond the allure of commerce, Jefferson placed immense importance on unequivocally declaring US sovereignty over the vast tracts of land that were, in reality, already occupied by numerous and distinct Native American tribes along the crucial Missouri River . This was a political imperative, asserting American dominion in a region where European powers still held influence and indigenous nations maintained their independence. Simultaneously, he sought to gain an accurate and comprehensive understanding of the natural resources embedded within the recently completed Louisiana Purchase . Knowing what lay beneath the surface and grew upon it was essential for future economic exploitation and national development. While the expedition undeniably made notable contributions to the nascent field of science—cataloging new species, mapping unknown terrains, and observing meteorological phenomena—it is crucial to understand that scientific research, despite its eventual significance, was not the main goal of this mission. It was a valuable byproduct, a bonus feature, rather than the core directive. The grand vision was primarily about geopolitics, trade, and territorial assertion.

Preparations

For many years leading up to his presidency, Thomas Jefferson had been an avid consumer of exploration narratives, devouring accounts of adventurers who ventured into the western frontier. This sustained intellectual curiosity fueled a long-held interest in further exploring what was, to the nascent United States, a largely unknown and mythical region of the continent. His fascination wasn’t new; in the 1780s, during his tenure as Minister to France in Paris , Jefferson had engaged in discussions with the eccentric American adventurer John Ledyard regarding a potential overland journey to the Pacific Northwest . Ledyard, fresh from his circumnavigation with Captain James Cook , had his own ambitious plans, though they never fully materialized under Jefferson’s patronage.

Jefferson’s literary diet also included Captain James Cook ’s seminal work, A Voyage to the Pacific Ocean (London, 1784), which recounted Cook’s third voyage and offered tantalizing glimpses of the Pacific coast. Equally influential was Le Page du Pratz ’s The History of Louisiana (London, 1763), a work that, despite its dubious geographical claims, painted a vivid picture of the interior. These texts, among others, profoundly shaped Jefferson’s conviction that an American expedition to the Pacific was not merely desirable but essential. Like Captain Cook, he was driven by the ambition to discover a practical and efficient route, ideally an all-water passage, through the Northwest to the distant Pacific coast.

The urgency of this endeavor was underscored by the exploits of Alexander Mackenzie . Mackenzie, a Scottish explorer in the service of the North West Company, had already charted a route in his own quest for the Pacific, famously following Canada ’s Mackenzie River to the frigid Arctic Ocean in 1789. More significantly, in 1793—a full twelve years before Lewis and Clark—Mackenzie and his party became the first non-indigenous people to successfully cross mainland North America, north of Mexico , reaching the Pacific coast of British Columbia . Mackenzie’s detailed accounts, published in Voyages from Montreal (1801), served as a stark warning to Jefferson. They revealed Britain ’s clear intent to establish control over the immensely lucrative fur trade along the Columbia River , convincing the American President of the paramount importance of securing this vital territory for the United States with utmost haste. The race for the continent was on.

Logistical preparations were meticulous. In Philadelphia , Israel Whelen , the purveyor of public supplies, was tasked with acquiring a bewildering array of necessities for the expedition, working from a detailed list meticulously compiled by Lewis. Among the more… interesting items were 193 pounds of portable soup —a concentrated, dried broth that promised sustenance without bulk, though its palatability remains a matter of historical debate. There were also 130 rolls of pigtail tobacco , a universal currency and comfort, 30 gallons of potent spirit of wine (likely a high-proof alcohol for medicinal and morale purposes), and a wide assortment of “Native American presents” intended for diplomatic overtures. Medical and surgical supplies, crucial for a journey into the unknown, were procured, alongside practical items like mosquito netting and durable oilskin bags to protect precious cargo from the elements.

Two years into his presidency, with the Louisiana Purchase secured, Jefferson finally approached Congress to fund this ambitious expedition through the newly acquired territory all the way to the Pacific Ocean . He made no attempt to keep the Lewis and Clark expedition a secret from Spanish, French, or British officials, but rather offered various, often vague, reasons for the venture. However, when requesting the crucial funding, he opted for a secret message. This subterfuge was a pragmatic response to the fractious political climate, specifically the poor relations he endured with the opposition Federalist Party in Congress, who were unlikely to support such an ambitious and costly undertaking if its true scope and implications were fully revealed. Congress, perhaps swayed by the limited information or the allure of the unknown, subsequently appropriated a modest $2,324 for supplies and food, the expenditure of which was entrusted to Captain Lewis.

In 1803, President Jefferson formally commissioned the Corps of Discovery and appointed his personal secretary, Army Captain Meriwether Lewis , as its leader. Lewis, in turn, extended an invitation to his trusted friend and former military superior, William Clark , to co-lead the expedition as a Second Lieutenant. Lewis, a man of demonstrated resilience and an innate understanding of frontier life, possessed remarkable skills and considerable potential as a frontiersman. Jefferson, recognizing this, made concerted efforts to further prepare him for the immense challenges of the journey ahead, even as the expedition was still navigating the bureaucratic hurdles of approval and funding. Jefferson articulated his confidence in Lewis, explaining his choice with a telling blend of pragmatism and idealism:

“It was impossible to find a character who to a complete science in botany, natural history, mineralogy & astronomy, joined the firmness of constitution & character, prudence, habits adapted to the woods & a familiarity with the Indian manners and character, requisite for this undertaking. All the latter qualifications Capt. Lewis has.”

This rather backhanded compliment, while highlighting Lewis’s practical strengths, subtly acknowledged his need for further academic polish. To address these perceived gaps, in 1803, Jefferson dispatched Lewis to Philadelphia , then the intellectual capital of the young nation, for an intensive crash course. He studied medicinal cures under Benjamin Rush , a renowned physician and a former leader in the American Revolution . Lewis’s education extended to navigation, where Andrew Ellicott , a prominent astronomer , instructed him in the intricate use of a sextant and other essential navigational instruments. From Benjamin Smith Barton , a leading botanist, Lewis acquired the crucial skills for describing and meticulously preserving plant and animal specimens. Robert Patterson provided refinements in computing latitude and longitude, ensuring the accuracy of their maps, while Caspar Wistar offered insights into fossils and the tantalizing possibility of encountering still-living remnants of prehistoric creatures. It would be disingenuous to suggest Lewis was entirely ignorant of science before this; he had already demonstrated a marked capacity for learning, particularly under Jefferson’s tutelage. At Monticello , Jefferson maintained an enormous personal library, particularly rich in works on North American geography, to which Lewis had unrestricted access. He spent considerable time poring over maps and books, and engaging in deep discussions with Jefferson himself, absorbing knowledge and refining his understanding of the continent.

The expedition’s primary vessel for its initial year, a specially designed keelboat , was constructed near Pittsburgh, Pennsylvania , during the summer of 1803. Built precisely to Lewis’s detailed specifications, it was completed on August 31. This stout vessel was immediately loaded with the vast array of equipment and provisions deemed necessary for such an ambitious undertaking. While in Pittsburgh, Lewis also made a rather significant, and ultimately invaluable, acquisition: a Newfoundland dog , whom he named Seaman , to accompany the party. Newfoundlands are celebrated for their amiable disposition, impressive size, and remarkable swimming abilities, often found assisting on fishing boats due to their natural affinity for water rescues. Seaman proved to be an exceptionally valuable member of the Corps, providing assistance with hunting, acting as an early warning system against bears and other potential predators, and offering a steadfast, if furry, companionship. Notably, he was the only animal to complete the entire arduous journey.

Lewis and his initial crew embarked that very afternoon, beginning their downstream voyage along the Ohio River . Their destination was a rendezvous with Clark near Louisville, Kentucky , at the Falls of the Ohio , which they reached in October 1803. The overarching goals of this combined force were multifaceted: to thoroughly explore the immense territory newly acquired by the Louisiana Purchase and to establish both trade relations and US sovereignty over the numerous Native American nations inhabiting the lands along the Missouri River . Jefferson also harbored the strategic ambition of solidifying a US claim of “discovery” to the distant Pacific Northwest and the expansive Oregon Territory . This involved meticulously documenting an American presence there before other European nations could effectively assert their own claims, a critical move in the geopolitical chess game of the era. According to certain historians, Jefferson astutely understood that a robust claim of ownership to the Pacific Northwest would be significantly strengthened if the expedition meticulously gathered and presented scientific data on the region’s unique animals and plants, thereby demonstrating a comprehensive engagement with the territory beyond mere passage. However, as previously noted, his main objectives remained firmly centered around the elusive pursuit of an all-water route to the Pacific coast and the promise of lucrative commerce that such a route would unlock. His detailed instructions to the expedition leaders left little room for misinterpretation:

“The object of your mission is to explore the Missouri River, & such principle stream of it, as, by its course and communication with the waters of the Pacific ocean, whether the Columbia, Oregon, Colorado or any other river may offer the most direct & practicable water communication across this continent for the purpose of commerce.”

Camp Dubois (Camp Wood) reconstruction, where the Corps of Discovery mustered on the east side of the Mississippi River, through the winter of 1803–1804, to await the transfer of the Louisiana Purchase to the United States

To facilitate their diplomatic objectives, the US mint meticulously prepared special silver medals, featuring a portrait of Jefferson and inscribed with messages of friendship and peace. These, known as Indian Peace Medals , were intended for distribution to the various tribes they would encounter, serving as tangible tokens of goodwill and American authority. Alongside these symbols of peace, the expedition also prepared an impressive arsenal of advanced weapons, designed not for immediate conflict, but to conspicuously display their formidable military firepower. Among these was a remarkable Austrian-made .46 caliber Girandoni air rifle , a sophisticated repeating rifle equipped with a 20-round tubular magazine, powerful enough to fell a deer. This silent, deadly weapon would undoubtedly have been a source of both awe and apprehension among indigenous peoples unfamiliar with such technology. The expedition was also equipped with more conventional flintlock firearms, an assortment of knives, essential blacksmithing supplies for repairs and trade, and precise cartography equipment for their mapping duties. They carried flags to plant, gift bundles to exchange, medicinal supplies for the inevitable ailments, and other sundry items deemed vital for their extensive and perilous journey.

The ambitious route planned for Lewis and Clark’s expedition, which envisioned ascending the Missouri River to its headwaters, then crossing to the Columbia River and following it to the Pacific Ocean , may have been subtly influenced by the purported transcontinental journey of an indigenous man named Moncacht-Apé . This journey, said to have occurred about a century prior, reportedly followed a remarkably similar path. Jefferson himself possessed a copy of Le Page du Pratz ’s book in his extensive library, which detailed Moncacht-Apé’s itinerary, and Lewis, perhaps with a touch of optimistic credulity, carried a copy with him throughout the expedition. Le Page’s description of Moncacht-Apé’s route, however, notably—and misleadingly—neglected to mention the formidable challenges of traversing the towering Rocky Mountains . This crucial omission might very well be the origin of Lewis and Clark’s mistaken, and almost fatal, belief that they could easily portage their boats from the headwaters of the Missouri to the westward-flowing Columbia, a geographical fantasy that would soon be shattered by the unforgiving reality of the American West.

Journey

• For a chronological guide, because some people prefer things laid out linearly: see Timeline of the Lewis and Clark Expedition .

Departure

Corps of Discovery meet Chinooks on the Lower Columbia , October 1805 ( Lewis and Clark on the Lower Columbia painted by Charles Marion Russel , c. 1905)

The Corps of Discovery officially commenced its epic voyage from Camp Dubois (also known as Camp Wood) at precisely 4 PM on May 14, 1804. Under the immediate command of William Clark , this initial contingent embarked up the Missouri River in their sturdy keelboat and two additional pirogues . Their destination was St. Charles, Missouri , where Captain Meriwether Lewis would join them six days later, after attending to final preparations. The unified expedition then set out from St. Charles the very next afternoon, on May 21, truly beginning their westward push. While precise figures sometimes vary, historical consensus suggests the Corps ultimately comprised as many as 45 individuals. This diverse group included the commissioned officers, a contingent of enlisted military personnel, several civilian volunteers, and crucially, York , an African American man who was enslaved by Clark, whose contributions would prove indispensable, yet whose freedom remained tragically deferred.

From St. Charles, Missouri , the expedition diligently followed the meandering course of the Missouri River , navigating through what would eventually become bustling urban centers like Kansas City, Missouri , and Omaha, Nebraska . The journey, however, was not without its costs. On August 20, 1804, Sergeant Charles Floyd tragically succumbed to what was, by all accounts, acute appendicitis . He holds the somber distinction of being among the very first to volunteer for the Corps of Discovery and, notably, the only member of the expedition to die during the entirety of the voyage. His burial took place on a prominent bluff overlooking the river, a site now reverently named after him , located in what is today Sioux City , Iowa . His grave was simply marked with a cedar post, upon which his name and the date of his untimely death were inscribed. Just a mile (2 km) further upriver, the expedition established a camp near a smaller tributary, which they subsequently named Floyd’s River in his memory. During the final week of August, the Corps reached the ecological threshold of the vast Great Plains , a land teeming with an astonishing abundance of wildlife, including massive herds of elk , countless deer , the majestic bison , swift pronghorn , and industrious beavers . It was a vision of untamed nature, both awe-inspiring and daunting.

The Lewis and Clark Expedition engaged with, and established varying degrees of relations with, no fewer than two dozen distinct Native American nations during their traverse. Without the invaluable assistance, profound knowledge, and often direct intervention of these indigenous groups, the expedition’s fate would have been far more precarious. They would have risked certain starvation during the brutal, unforgiving winters and, perhaps even more certainly, become hopelessly lost within the labyrinthine ranges of the immense Rocky Mountains . Their survival was, in many ways, contingent upon the very people whose lands they were charting for a foreign power.

One of the most significant and challenging encounters occurred between the Americans and the powerful Lakota nation—a people the Americans, with characteristic oversimplification, often referred to as Sioux or “Teton-wan Sioux.” This initial meeting was fraught with tension, raising genuine concerns that the two sides might erupt into open conflict. As historian Harry W. Fritz notes with dry precision, “All earlier Missouri River travelers had warned of this powerful and aggressive tribe, determined to block free trade on the river. … The Sioux were also expecting a retaliatory raid from the Omaha tribe, to the south. A recent Sioux raid had killed 75 Omaha men, burned 40 lodges, and taken four dozen prisoners.” The expedition’s parley with the Lakota took place near the confluence of the Missouri and Bad Rivers, a location now recognized as Fort Pierre, South Dakota .

Reconstruction of Fort Mandan , Lewis and Clark Memorial Park, North Dakota

During this tense standoff, one of the expedition’s horses mysteriously vanished, and the Americans, perhaps correctly, suspected the Sioux were responsible. Subsequently, when the two sides met again, a heated disagreement ensued. The Sioux, asserting their territorial rights, demanded that the Americans either remain in their territory indefinitely or provide a more substantial tribute in gifts before being granted passage. Clark, notoriously short-tempered and culturally insensitive, recorded his disdain, labeling the Sioux as “warlike” and the “vilest miscreants of the savage race.” The situation teetered on the brink of violence multiple times, with both sides preparing for confrontation. It was only through the intervention of the Lakota chief, Black Buffalo, who, with a shrewd understanding of the fragile peace, persuaded Lewis to distribute additional tobacco to the assembled warriors, that a bloody clash was narrowly averted. Lewis, recognizing the precariousness of their position, complied, and the expedition was eventually permitted to continue its arduous journey upstream toward the villages of the Arikara people.

As winter descended in 1804–1805, the party prudently constructed Fort Mandan , a defensive encampment situated near present-day Washburn, North Dakota . Just prior to their departure on April 7, 1805, a significant portion of the expedition’s findings was carefully loaded onto the keelboat and dispatched back to St. Louis . This cargo included a remarkable collection of specimens, many of which had never before been observed or documented east of the Mississippi River—a tangible testament to the wonders of the unexplored West. During their stay, one particular chief, perhaps testing the Americans’ intentions or simply asserting his own authority, requested that Lewis and Clark provide a boat specifically for passage through his nation’s territory. The Americans, ever eager to press westward, politely declined and promptly continued their upstream journey, establishing their winter quarters within the hospitable territory of the Mandan nation.

Once the expedition had established their winter camp, members of nearby tribes, drawn by curiosity and the promise of trade, came to visit in considerable numbers, with some even choosing to stay throughout the night. Over several days, Lewis and Clark engaged in formal councils with the Mandan chiefs, initiating diplomatic relations. It was during this crucial period that they encountered Toussaint Charbonneau , a French-Canadian fur trapper, and his remarkably young Shoshone wife, [Sacagawea]. Charbonneau, with his linguistic skills and familiarity with indigenous cultures, soon began to serve as a vital translator for the expedition. A fragile peace was formally established between the expedition and the Mandan chiefs, sealed by the solemn ritual of sharing a Mandan ceremonial pipe . By April 25, Captain Lewis meticulously documented the expedition’s progress and his observations of the Native American nations encountered thus far. His detailed report, titled A Statistical view of the Indian nations inhabiting the Territory of Louisiana, comprehensively outlined the names of various tribes, their precise geographical locations, their established trading practices, and the crucial water routes they utilized, among other pertinent details. President Jefferson, upon receiving this invaluable intelligence, would later present the report to Congress, offering them a first glimpse into the human landscape of the new territories.

Lewis and Clark meeting the Bitterroot Salish at Ross Hole, September 4, 1805

Continuing their relentless westward push, the Corps followed the Missouri River to its very headwaters, a feat of endurance and navigation. From there, they faced the daunting task of crossing the Continental Divide at Lemhi Pass , a treacherous ascent that marked a critical transition from the eastern to the western watershed. After this formidable challenge, they turned north, eventually reaching Traveler’s Rest , a welcome respite before tackling another colossal barrier: crossing the formidable Bitteroots via Lolo Pass . This segment involved arduous travel on foot, underscoring the impossibility of their earlier dream of an easy water passage. Once past the mountains, they transitioned to canoes, embarking on a swift descent down the Clearwater , Snake , and finally the mighty Columbia rivers . Their watery path took them past the impressive Celilo Falls and what would one day become present-day Portland , situated strategically at the confluence of the Willamette and Columbia rivers. Crucially, as they neared the lower Columbia, Lewis and Clark were able to utilize the invaluable notes and maps compiled by William Robert Broughton during his 1792 exploration, which helped them orient themselves in the increasingly familiar landscape. The dramatic sighting of Mount Hood and other prominent stratovolcanos served as an unmistakable, and no doubt exhilarating, confirmation that the expedition had indeed almost reached its ultimate goal: the vast expanse of the Pacific Ocean .

Pacific Ocean

Fort Clatsop reconstruction on the Columbia River near the Pacific Ocean

The expedition finally caught its first breathtaking glimpse of the Pacific Ocean on November 7, 1805, a moment of profound triumph after nearly eighteen months of unrelenting toil. They arrived at the coast proper two weeks later, but this arrival merely marked the beginning of their second bitter winter, a period of intense hardship. Their initial encampment was on the north side of the Columbia River , in a particularly storm-wracked and inhospitable area that William Clark , with characteristic understatement, christened Dismal Nitch . A critical and persistent problem was the severe lack of food. The abundant elk, which had served as the party’s primary source of sustenance for much of the journey, had, with a frustrating sense of timing, retreated from their usual haunts into the higher mountains. The expedition, by this point, was too depleted in trade goods and resources to purchase sufficient provisions from the local, often wary, tribes.

Faced with these dire circumstances, a significant decision was made on November 24, 1805. In a remarkably democratic act for its time, the majority of the party voted to relocate their camp to the more sheltered south side of the Columbia River , near the site of modern Astoria, Oregon . Notably, both Sacagawea and the enslaved York were permitted to participate in this vote, a rare acknowledgment of their agency within the hierarchical structure of the Corps.

On the south side of the Columbia River, approximately 2 miles (3 km) upstream on the west bank of the Netul River (now aptly renamed the Lewis and Clark River), the Corps diligently constructed Fort Clatsop . This wasn’t merely a practical exercise in building shelter and protection from the relentless coastal weather; it served a crucial geopolitical purpose. By raising the American flag over the newly established fort, Lewis and Clark were officially asserting and establishing an American presence in a territory coveted by other European powers, a tangible manifestation of Jefferson’s “discovery doctrine.” During their long, often dreary winter at Fort Clatsop, Lewis dedicated himself to the intellectual pursuits he had been trained for. He meticulously filled many pages of his journals, documenting a wealth of valuable knowledge, primarily focused on botany , inspired by the incredibly abundant and diverse flora that carpeted that verdant part of the continent. However, the men’s health suffered considerably; many members of the expedition found themselves battling debilitating colds and persistent influenza, a testament to the harsh conditions and constant exposure.

Aware that maritime fur traders occasionally frequented the lower Columbia River , Lewis and Clark made repeated inquiries to the local Chinooks regarding the visits of trading ships. They learned that a Captain Samuel Hill had been in the area in early 1805. A slight miscommunication led William Clark to record the name as “Haley” in his journals. Captain Hill did, in fact, return in November 1805, anchoring his vessel approximately 10 miles (16 km) from Fort Clatsop . The Chinook informed Hill of Lewis and Clark’s presence, yet, for reasons unknown, no direct contact was ever made between the two American parties.

Unbeknownst to Lewis and Clark, a Russian maritime expedition under the statesman Nikolai Rezanov arrived at the mouth of the Columbia River while the Americans were still encamped at Fort Clatsop . The two groups, separated by a mere few miles, remained completely unaware of each other’s presence. Rezanov, who had sailed from Novo-Arkhangelsk (modern-day Sitka, Alaska ), harbored ambitious plans to establish a Russian agricultural colony on the lower Columbia, intended to alleviate the perennial food shortages plaguing Russian America . He even envisioned relocating the capital of Russian America from Sitka to this more temperate and fertile region. However, his ship, the Juno, proved unable to successfully navigate and cross the notoriously treacherous Columbia Bar . Frustrated in his primary objective, Rezanov instead altered course for California, a detour that inadvertently set in motion the eventual founding of Fort Ross, California , further down the Pacific coast.

Return trip

Meriwether Lewis , ever the meticulous planner, had initially resolved to remain at Fort Clatsop until April 1. However, the pervasive dampness, the constant illness among his men, and the sheer monotony of the coastal winter camp fueled his impatience, making him anxious to depart at the earliest feasible opportunity. By March 22, the relentless stormy weather had finally begun to subside, offering a glimmer of hope. The following morning, March 23, 1806, the long-anticipated journey home officially commenced. The Corps of Discovery began their eastward trek, initially utilizing their canoes to ascend the challenging Columbia River against the current, and subsequently transitioning to arduous overland travel as the terrain demanded.

Before their departure from Fort Clatsop , William Clark entrusted a crucial letter to the local Chinook people, with instructions to pass it along to the next ship captain who might visit the area. As fate would have it, this letter found its way into the hands of the very same Captain Samuel Hill who had been anchored nearby during their winter encampment. Hill, understanding its significance, transported the letter to Canton , China, from where it was forwarded to Thomas Jefferson . Remarkably, President Jefferson received this update on the expedition’s progress before Lewis and Clark themselves had even returned to St. Louis .

The Corps made their way with determined effort to Camp Chopunnish (which the Captains referred to as the Nez Perce Pass ) in Idaho , establishing their camp along the north bank of the Clearwater River . Here, the members of the expedition diligently collected 65 horses, a critical component of their preparations for the formidable challenge of crossing the towering Bitterroot Mountains , the natural barrier lying between modern-day Idaho and western Montana. However, the unforgiving high-altitude passes were still heavily blanketed in snow, a persistent obstacle that prevented the expedition from making their intended crossing. On April 11, while the Corps patiently awaited the diminishing snows, an unfortunate incident occurred: Lewis’s beloved Newfoundland dog , Seaman , was stolen by some Native Americans . Fortunately, he was retrieved shortly thereafter. Worried that such mischievous acts might escalate into more serious threats, Lewis, ever the pragmatist, issued a stern warning to the local chief: any further wrongdoing or acts of thievery would result in immediate and lethal consequences.

On July 3, just before attempting to recross the Continental Divide , the Corps of Discovery made a strategic decision to split into two separate teams. This was done primarily to allow Lewis the opportunity to further explore the Marias River , a significant tributary that Jefferson had specifically instructed them to investigate for potential water routes. Lewis’s smaller group of four soon encountered some men from the Blackfeet nation. During the night, in a tense and ultimately tragic turn of events, the Blackfeet attempted to steal the expedition’s weapons. In the ensuing struggle, a violent confrontation erupted, resulting in the deaths of two Blackfeet men at the hands of the soldiers. Lewis, George Drouillard , and the Field brothers were forced to flee, covering an astonishing distance of over 100 miles (160 kilometers) in a single day before they dared to camp again.

Meanwhile, William Clark ’s contingent had ventured into the territory of the Crow tribe . In a stark parallel to Lewis’s group, half of Clark’s horses mysteriously disappeared during the night, yet not a single Crow warrior was ever seen. The two separated groups of the Corps endured this division until they finally reunited at the strategic confluence of the Yellowstone and Missouri Rivers on August 11. As the groups joyfully reassembled, a momentary lapse in judgment led to another unfortunate incident: one of Clark’s hunters, Pierre Cruzatte, mistook Lewis for an elk amidst the dense foliage and fired his weapon, accidentally injuring Lewis in the thigh. Despite this setback, once fully reunited, the Corps of Discovery was able to accelerate their journey home, making swift progress via the familiar waters of the Missouri River. They finally reached St. Louis on September 23, 1806, marking the triumphant, if somewhat battered, conclusion of their epic expedition.

Spanish interference

Even before the Lewis and Clark expedition officially commenced in May 1804, the Spanish authorities in New Mexico had already received intelligence, in March of that year, from a rather dubious source: General James Wilkinson . This intelligence indicated that the Americans were, in no uncertain terms, encroaching upon territory that Spain steadfastly claimed as its own. It was later discovered, after Wilkinson’s death in 1825, that he had been secretly operating as a spy for the Spanish crown, making his “intelligence” a deliberate act of sabotage against his own nation’s endeavors.

With the Lewis and Clark expedition fully underway in May, the Spanish reacted with predictable alarm and decisive action. On August 1, 1804, they dispatched no fewer than four armed expeditions, comprising a total of 52 soldiers, mercenaries (a rather telling detail for a supposedly sovereign territory, begging the question of their origins and allegiances), and a significant number of Native American auxiliaries. These forces set out from Santa Fe , New Mexico, heading northward under the command of Pedro Vial and José Jarvet. Their explicit mission was to intercept Lewis and Clark and, if successful, to imprison the entire American expedition, thereby thwarting Jefferson’s territorial ambitions. However, despite their considerable numerical advantage and the element of surprise, the Spanish forces proved to be too slow. They eventually reached a Pawnee settlement on the Platte River in central Nebraska, only to learn that the American expedition had passed through that very location many days prior. Vial’s determined attempt to intercept them was, ultimately, unsuccessful, a testament either to the Corps’s efficiency or the vastness of the territory.

Geography and science

Map of Lewis and Clark’s expedition: It changed mapping of northwest America by providing the first accurate depiction of the relationship of the sources of the Columbia and Missouri Rivers, and the Rocky Mountains around 1814

The Lewis and Clark Expedition fundamentally reshaped the understanding of the geography of the American Northwest, moving it from the realm of speculation and rough sketches to that of verifiable fact. Their meticulous efforts resulted in the production of the first truly accurate maps of this vast and previously uncharted area. Throughout their arduous journey, Lewis and Clark diligently created approximately 140 maps, each one contributing to a comprehensive cartographic record. As historian Stephen Ambrose succinctly states, the expedition “filled in the main outlines” of the region, transforming an almost blank slate into a recognizable landscape.

Beyond cartography, the expedition undertook the crucial task of documenting natural resources and a plethora of plants and animals that had been entirely unknown to European Americans, though, of course, intimately familiar to the indigenous peoples who had lived there for millennia. Lewis and Clark hold the distinction of being the first Americans to successfully cross the formidable Continental Divide , a hydrological boundary that separates the continent’s eastern and western watersheds. They were also the first Americans to lay eyes upon the awe-inspiring Yellowstone region, the first to formally enter the territory that would become Montana, and the first to produce an official, detailed description of these distinct and magnificent geographical areas. Their physical presence in the Pacific Northwest , coupled with the creation of their detailed maps and the formal proclamations of US sovereignty—symbolized by the distribution of medals and the raising of flags—were considered vital legal steps. These actions were intended to establish a claim to each indigenous nation’s lands under the controversial and ethically dubious framework of the discovery doctrine , a concept that implicitly denied the pre-existing sovereignty of Native American peoples.

The intellectual backbone of the expedition was further strengthened by its sponsorship from the prestigious American Philosophical Society (APS), a clear indication that this was more than just a military reconnaissance. Lewis and Clark received specialized instruction in a variety of scientific disciplines, a testament to Jefferson’s Enlightenment ideals. This included, but was not limited to, astronomy , botany , climatology , ethnology , geography , meteorology , mineralogy , ornithology , and zoology . The breadth of their scientific mandate was immense. During the course of the expedition, they made contact with over 70 distinct Native American tribes, meticulously recording their observations. Furthermore, they described more than 200 new plant and animal species, providing invaluable data for future scientific study.

Jefferson’s instructions to the expedition extended beyond mere observation; he explicitly directed them to declare “sovereignty” and to conspicuously demonstrate their military strength. This was a calculated strategy, designed to ensure that the native tribes they encountered would understand their subordinate position relative to the burgeoning power of the United States, mirroring the colonial practices employed by European powers elsewhere across the globe. In the aftermath of the expedition, the remarkably accurate and detailed maps that were produced became indispensable tools, directly facilitating the further exploration and subsequent settlement of this vast territory in the decades that followed, irrevocably altering the demographic and political landscape of the American West.

In 1807, a private in the U.S. Army who had been promoted to sergeant during the course of the expedition, Patrick Gass , published his own account of the journey. This was the first published narrative from a member of the Corps, offering an immediate, if somewhat less formal, perspective. Later, Paul Allen took on the task of editing a two-volume history of the Lewis and Clark expedition, which saw publication in 1814 in Philadelphia . However, this work was notably published without any explicit mention of its actual author, the banker Nicholas Biddle , who had meticulously compiled and shaped the narrative from the original journals. Even with these early publications, the complete and unexpurgated report of the expedition’s findings was not made public until much more recently, leaving many of their discoveries in relative obscurity for decades. Today, the earliest authorized edition of the invaluable Lewis and Clark journals is carefully preserved within the distinguished collections of the Maureen and Mike Mansfield Library at the University of Montana .

Encounters with Native Americans

One of the expedition’s most critical, if less romanticized, primary objectives, as explicitly directed by President Jefferson, was to function as a comprehensive surveillance mission. The Corps was tasked with reporting back detailed information regarding the whereabouts, estimated military strength, daily lives, activities, and distinct cultures of the numerous Native American tribes inhabiting the territory newly acquired by the United States as part of the monumental Louisiana Purchase , and indeed, the broader northwest region. The overarching message they were to convey to these native peoples was unambiguous: their ancestral lands now belonged to the United States, and “their great father” in Washington was now their sovereign. This was not a negotiation; it was an assertion of dominion.

Throughout their extensive journey, the expedition encountered a diverse array of native nations and tribes. Many of these indigenous groups, demonstrating remarkable hospitality and pragmatic generosity, offered crucial assistance, sharing their profound knowledge of the unforgiving wilderness and providing much-needed food, without which the Corps would have undoubtedly perished. The expedition members were equipped with blank, leather-bound journals and ample ink, specifically for the purpose of meticulously recording these encounters, alongside their scientific and geological observations. They also carried a carefully selected assortment of gifts—medals, ribbons, needles, mirrors, and other trinkets—intended to ease potential tensions and facilitate negotiations with the various Native American chiefs they would inevitably encounter along their arduous path.

Given the existing interactions, many of the tribes the Corps met had already established friendly, if often transactional, experiences with British and French fur traders in various isolated encounters along the Missouri and Columbia Rivers . Consequently, for the most part, the expedition did not encounter overt hostilities. However, this relative peace was famously shattered by a tense and volatile confrontation on September 25, 1804, with the powerful Teton-Sioux tribe—more accurately known as the Lakota people , one of the three principal tribes comprising the formidable Great Sioux Nation . Under the leadership of chiefs like Black Buffalo and the Partisan, these Lakota warriors directly confronted the expedition, unequivocally demanding tribute for their passage over the river.

The seven distinct native tribes that collectively comprised the Lakota people exercised dominion over a vast inland empire, and it was their long-established custom to expect gifts, or tribute, from any strangers—be they explorers or traders—who wished to navigate their rivers or traverse their extensive hunting grounds. As Harry W. Fritz, with a historian’s dispassion, reminds us: “All earlier Missouri River travelers had warned of this powerful and aggressive tribe, determined to block free trade on the river. … The Sioux were also expecting a retaliatory raid from the Omaha tribe, to the south. A recent Sioux raid had killed 75 Omaha men, burned 40 lodges, and taken four dozen prisoners.” The Lakota were not to be trifled with.

Captain Lewis, perhaps misjudging the intricate protocols of Lakota diplomacy, made an initial error by offering gifts to only one of the Sioux chiefs first, a slight that deeply insulted and angered the Partisan chief. Communication proved exceptionally difficult, as the expedition’s sole Sioux language interpreter, Pierre Dorion, had remained behind with another party, engaged in diplomatic affairs with a different tribe. Consequently, both chiefs were eventually offered a few gifts, but neither was satisfied, demanding more substantial offerings for their warriors and the tribe as a whole. At this critical juncture, some of the Partisan tribe’s warriors, emboldened by the perceived weakness, physically seized hold of the expedition’s boat and one of its oars. Lewis, recognizing the escalating danger, took a firm, unyielding stand, ordering a decisive display of force and presenting arms. Captain Clark, equally resolute, brandished his sword and openly threatened violent reprisal, signaling that the Americans would not be easily intimidated. It was only moments before the situation erupted into a bloody confrontation that Black Buffalo, demonstrating remarkable leadership and a desire to avert bloodshed, ordered his warriors to back off from the American vessel.

Through a combination of more generous gifts—and, perhaps more tellingly, a bottle of whiskey, a potent tool in cross-cultural negotiations—the captains were ultimately able to negotiate their passage without further incident. For the next two days, the expedition made camp not far from Black Buffalo’s tribe, a continued testament to the delicate balance they maintained. Similar, albeit less intense, incidents occurred when the Corps attempted to depart, but these potential troubles were again averted through the strategic distribution of additional tobacco, a commodity universally valued.

Observations

As the expedition progressed and encountered the myriad Native American tribes during the course of their journey, they diligently observed and meticulously recorded information regarding their diverse lifestyles, intricate customs, and the complex social codes by which they lived. This was, after all, a direct directive from President Jefferson, who sought a comprehensive understanding of the continent’s human inhabitants. From a European perspective, the Native American way of life frequently appeared harsh, unforgiving, and utterly alien, as witnessed and documented by the members of the expedition. However, after numerous prolonged encounters and the experience of camping in close proximity to various Native American nations for extended periods during the brutal winter months, the Corps members soon gained a firsthand, albeit often biased, understanding of their customs and social orders.

One of the primary customs that sharply distinguished many Native American cultures from those of the West was the widespread practice of polygyny. It was customary for men, particularly those with sufficient resources, to take on two or more wives if they possessed the means to adequately provide for them. Furthermore, it was often observed that men in tribes such as the Minnetaree (also known as the Hidatsa) and Mandan would marry within their immediate family circles, frequently taking a sister as a wife. The concept of chastity among women, as understood by European standards, was generally not held in high regard in many of these societies. Disturbingly, infant daughters were, on occasion, reportedly sold by their fathers to grown men, typically in exchange for valuable commodities such as horses or mules. While this practice was noted among some nations, it was not universally applied; for instance, it was distinctly not practiced among the Shoshone nation, who, by the observations of the expedition, held their women in significantly higher esteem.

The expedition also bore witness to the grim reality that many of the Native American nations were in a state of perpetual warfare with rival tribes. This was particularly evident with the powerful Sioux , who, while generally maintaining a pragmatic friendliness toward white fur traders, proudly boasted of, and indeed justified, their almost complete destruction of once-great nations. These included the once-flourishing Cahokia nation, along with the Missouris, Illinois, Kaskaskia , and Piorias tribes, all of whom had historically inhabited the fertile countryside adjacent to the upper Mississippi and Missouri rivers. The expedition’s journals thus painted a picture of a complex and often violent indigenous world, far removed from any romanticized notions.

Sacagawea

• Main article: Sacagawea

Statue of Sacagawea , a Shoshone woman who accompanied the Lewis and Clark Expedition

Sacagawea , whose name is sometimes rendered as Sakajawea or Sakagawea (circa 1788 – December 20, 1812), was a young Shoshone Native American woman who joined the expedition to the Pacific Ocean alongside her husband and, crucially, her owner, Toussaint Charbonneau . Her presence, particularly with an infant, added an unexpected dimension to the journey.

On February 11, 1805, merely a few weeks after her initial contact with the expedition at Fort Mandan , Sacagawea went into a difficult and protracted labor. The process was slow and intensely painful, prompting the Frenchman Charbonneau to suggest a rather unconventional remedy: a potion derived from a rattlesnake’s rattle, believed to aid in delivery. Fortunately, Meriwether Lewis happened to possess some of this dried snake’s rattle among his medical supplies. A short time after administering the potion, Sacagawea successfully delivered a healthy baby boy, who was subsequently named Jean Baptiste Charbonneau . This newborn, often affectionately called “Pomp,” would become a constant, if tiny, companion on the arduous journey.

Later, as the expedition reached the Marias River on June 16, 1805, Sacagawea herself became dangerously ill, her condition causing considerable alarm among the Corps. She was, thankfully, able to find some measure of relief by drinking the mineral-rich water from a sulphur spring that flowed into the river, a natural remedy that likely saved her life.

While Sacagawea has been frequently, and often effusively, discussed in literature and popular culture, it is important to note that much of the information surrounding her role is often exaggerated or outright fictionalized. Scholars and careful examination of the expedition’s journals reveal that while she did occasionally point out geographical features familiar to her, “Sacagawea … was not the guide for the Expedition, she was important to them as an interpreter and in other ways.” Her primary and indispensable contributions lay in her linguistic abilities, particularly her knowledge of Shoshone, which was critical for negotiating with her own people for horses when the Corps desperately needed them to cross the Rocky Mountains . Furthermore, the mere sight of a woman, especially one with an infant son, would have been profoundly reassuring to many indigenous nations they encountered. This maternal presence played an important, if subtle, role in diplomatic relations, helping to ease tensions and conveying the impression that the expedition was a peaceful mission, not a war party.

It is worth noting that in his personal writings, Meriwether Lewis presented a somewhat negative and often dismissive view of Sacagawea, rarely giving her due credit. William Clark , however, held her in higher regard, demonstrating a more consistent appreciation for her contributions, and notably provided some financial and personal support for her children in the years following the expedition. It is also a sobering truth that in the journals, both captains frequently employed derogatory terms such as “squar” (squaw ) and “savages” to refer to Sacagawea and other indigenous peoples, a stark reminder of the prevalent racial prejudices of the era.

York

• Main article: York (explorer)

An enslaved Black man, known only by his given name York , was a vital participant in the Lewis and Clark Expedition , serving as the personal servant to William Clark , his enslaver. Despite the inherent injustice of his status, York contributed immensely to the success of the expedition. His physical strength was invaluable for the heavy labor involved in pulling boats upstream and setting up camps. He also proved to be an exceptionally skilled hunter, often providing much-needed game for the Corps’s sustenance. Beyond these practical skills, York’s unique appearance—he was the first Black man many Native Americans had ever seen—made him a figure of immense curiosity and, often, popularity among the indigenous tribes. His presence frequently facilitated initial contact and eased tensions, as he was seen as an exotic yet non-threatening figure.

Despite his undeniable and profound contributions to the Corps of Discovery , the tragic reality of his enslaved status overshadowed his achievements. Upon their return east, Clark, with cruel irony, refused to grant York his freedom from bondage. While all the other explorers were justly rewarded with double pay and grants of hundreds of acres of land for their service, York, the man who had endured the same perils and contributed just as much, received absolutely nothing. After the expedition’s conclusion, Clark permitted York only a brief, agonizing visit to Kentucky to see his wife, who was enslaved on a different plantation, before forcing him to return to Missouri. It is highly unlikely that he ever saw his wife again, a heartbreaking consequence of his continued enslavement. A decade after the expedition’s triumphant return, York was still, appallingly, enslaved, toiling as a wagoner for the Clark family. The final years of York’s life, fittingly for a man whose early life was so unjustly constrained, are shrouded in dispute. Intriguing accounts from the 1830s speak of a Black man who claimed to have first come with Lewis and Clark, now living as a respected chief among the Native Americans they met on the expedition, in what is now modern Wyoming. This narrative, if true, offers a poignant, if speculative, vision of freedom and respect that was denied to him by the nation he helped explore.

Accomplishments

The Corps of Discovery successfully met its fundamental objective of reaching the Pacific Ocean , a feat of endurance and navigation that captivated the young nation. Beyond simply arriving, they meticulously mapped the vast, unexplored territories they traversed, thereby establishing a tangible American presence that was crucial for asserting a legal claim to the land. They also, with varying degrees of success, established diplomatic relations and initiated trade with at least two dozen distinct indigenous nations, laying the groundwork, however tenuous, for future interactions.

While they did not discover the mythical continuous waterway to the Pacific Ocean that President Jefferson so fervently desired—a geographical impossibility—they did locate and document a crucial Native American trail. This vital overland connection linked the upper reaches of the Missouri River to the Columbia River , which, in turn, flowed directly to the Pacific. This trail, though not a waterway, represented a pragmatic, if arduous, route for future transcontinental travel and commerce. The expedition amassed an unprecedented wealth of information about the natural habitat, flora, and fauna of the American West, bringing back a diverse collection of plant, seed, and mineral specimens that astonished the scientific community back east. They meticulously mapped the intricate topography of the land, accurately designating the locations of towering mountain ranges, winding rivers, and the many Native American tribes encountered throughout their extensive journey. Furthermore, they diligently learned and recorded a considerable amount about the languages, customs, and social structures of these indigenous tribes, compiling invaluable ethnographic data. They also brought back numerous Native American artifacts, including bows, intricate clothing, and ceremonial robes, offering tangible insights into the cultures they had observed.

Aftermath

Two months after the expedition’s triumphant conclusion, President Jefferson finally made his first public statement to Congress and the nation. Characteristically, he offered a single, concise sentence summarizing the expedition’s success before delving into a lengthy justification for the considerable expenses incurred. He highlighted the acquisition of knowledge regarding “numerous tribes of Native Americans hitherto unknown; they informed themselves of the trade which may be carried on with them, the best channels and positions for it, and they are enabled to give with accuracy the geography of the line they pursued.” Back east, the botanical and zoological discoveries generated intense interest within the American Philosophical Society , which eagerly requested specimens, various artifacts traded with the Native Americans , and comprehensive reports on the newly documented plants and wildlife, along with any seeds obtained. Jefferson himself, ever the amateur botanist, used seeds from “Missouri hominy corn” along with a number of other unidentified seeds to plant at Monticello , where he cultivated and studied them. He later reported on the “Indian corn ” he had grown as being an “excellent” food source, a practical application of the expedition’s findings. Ultimately, the expedition played a pivotal role in firmly establishing the U.S. presence in the newly acquired territory and beyond, effectively opening the door to further exploration, burgeoning trade, and countless scientific discoveries that would shape the future of the American West.

Painting of Mandan Chief Big White , who accompanied Lewis and Clark on their return from the expedition

In a curious diplomatic gesture, Lewis and Clark returned from their expedition bringing with them the Mandan Native American Chief Shehaka , also known as Big White, from the Upper Missouri. The chief was to visit the “Great Father” in Washington, a journey intended to foster goodwill and demonstrate American power. However, returning Chief Shehaka safely to his nation proved to be an unexpectedly complex and costly endeavor, requiring multiple subsequent attempts and several military expeditions to navigate the treacherous political landscape and hostile tribes on the plains.

Upon their return, Lewis and Clark found themselves struggling with the daunting task of preparing their extensive manuscripts for publication. The sheer volume of their journals, filled with meticulous observations, maps, and drawings, was overwhelming. William Clark eventually managed to persuade Nicholas Biddle , a Philadelphia banker and literary figure, to undertake the arduous task of editing the journals. Biddle’s edited version was finally published in 1814 as History of the Expedition Under the Commands of Captains Lewis and Clark. However, Biddle’s narrative account, while engaging, regrettably omitted a significant portion of the material related to their groundbreaking discoveries in flora and fauna, prioritizing narrative flow over scientific detail. Since Biddle’s account remained the only widely printed version of the original journals for the next 90 years, many of Lewis and Clark’s invaluable scientific discoveries were later unknowingly “rediscovered” by other naturalists and subsequently given entirely new names, their original documentation languishing in obscurity. It wasn’t until 1904–1905, with the comprehensive publication of Original Journals of the Lewis and Clark Expedition by Reuben Gold Thwaites , that the general public finally became aware of the full, astonishing extent of the scientific and ethnographic discoveries made by the expedition.

During much of the 19th century, references to Lewis and Clark “scarcely appeared” in history books; the expedition was, astonishingly, largely forgotten, even during the fervor of the United States Centennial in 1876. It wasn’t until around the start of the 20th century that Lewis and Clark began to truly gain the national attention they deserved. Both the 1904 Louisiana Purchase Exposition in St. Louis and the 1905 Lewis and Clark Centennial Exposition in Portland, Oregon , played crucial roles in showcasing them as quintessential American pioneers. However, for many years, the popular narrative of their story remained relatively shallow, often presented as a simplistic celebration of US conquest and personal adventures. More recently, however, the expedition has been subjected to more thorough, nuanced, and critical research, delving into its complex legacy, including its impact on indigenous peoples and the environmental consequences of westward expansion. As of 1984, it was asserted that no US exploration party was more famous, and no American expedition leaders were more recognizable by name, though this claim now lacks current verification.

In 2004, a complete and meticulously reliable set of the expedition’s journals was finally compiled and edited by Gary E. Moulton, providing scholars and the public with the definitive record. Coinciding with the bicentennial of the expedition around 2004, this comprehensive publication, alongside numerous commemorative events, further elevated popular interest in Lewis and Clark, solidifying their place in the American historical consciousness.

Legacy and honors

The federal government, in a belated but significant acknowledgment, memorialized the winter assembly encampment at Camp Dubois in the 1970s, formally recognizing it as the official starting point of the Lewis and Clark voyage of discovery. More recently, in 2019, it further recognized Pittsburgh , Pennsylvania as the true genesis of the expedition, where Lewis began his journey down the Ohio.

Since the completion of their monumental expedition, Lewis and Clark have been extensively commemorated and honored over the years through a variety of mediums. They have been featured on various coins, currency, and commemorative postage stamps, their images etched into the fabric of American numismatics and philately. In 2004, to mark the bicentenary of the expedition, North Dakota State University Research Foundation released a new American elm cultivar, Ulmus americana ‘Lewis & Clark’ (marketed under the selling name Prairie Expedition). This particular tree boasts a notable resistance to Dutch elm disease , a fitting botanical legacy for two pioneering naturalists.

The expedition’s leaders have also lent their names to numerous geographical features and administrative divisions. Lewis and Clark County , nestled in Montana, and the Lewis and Clark River in Oregon both serve as enduring tributes. The Lewis and Clark Public School District in North Dakota educates future generations under their shared moniker. Furthermore, North Dakota state Highways 1804 and 1806 are specifically named to reflect the pivotal years of Lewis and Clark’s travels through the area, and together, they constitute the significant portion of the Lewis and Clark Trail that winds through the state. Even a campsite, Lewis and Clark, located in Camp Sandy Beach at Yawgoog Scout Reservation in Rockville , Rhode Island , stands as a testament to their enduring legacy, honoring both explorers.

• Lewis and Clark Expedition 150th anniversary issue, 1954
• Lewis and Clark were honored (along with the American bison ) on the Series of 1901 $10 Legal Tender
• Lewis and Clark Interpretive Center in Cape Disappointment State Park
• Lewis and Clark statue (with Seaman (dog) ) in St. Charles, Missouri
• Lewis and Clark Mosaic image in Missouri
• Sergeant Floyd Monument in Sioux City, Iowa is the first of 2,600 National Historic Landmarks in the United States

Prior discoveries

It’s worth noting, for those who appreciate chronological precision, that the concept of exploring North America was hardly novel when Lewis and Clark embarked. See also: Timeline of European exploration and Exploration of North America .

Long before Lewis and Clark set foot on the Missouri, other European explorers had already charted significant portions of the continent. In 1682, René-Robert Cavelier, Sieur de La Salle , famously traversed the entire length of the Mississippi River, from the Great Lakes region all the way to the Gulf of Mexico, claiming the vast territory of Louisiana for France. Following this monumental journey, the French systematically established a chain of trading posts and settlements along the Mississippi, extending from the nascent city of New Orleans northward to the Great Lakes. This era saw the exploits of numerous other French explorers, including the likes of Pedro Vial and Pierre Antoine and Paul Mallet , among many others, who delved deep into the interior. Notably, Vial, a French-Spanish explorer, may have even preceded Lewis and Clark into the territory that would become Montana. In 1787, he provided Spanish authorities with a detailed map of the upper Missouri River and the precise locations of “territories transited by Pedro Vial,” indicating a significant, albeit less publicized, earlier presence.

Early in 1792, the American sea captain Robert Gray , commanding the ship Columbia Rediviva, made a pivotal discovery: the mouth of a great river on the Pacific coast. He subsequently named it the Columbia River after his vessel and, crucially, claimed it for the United States. Later that same year, the Vancouver Expedition , led by the British explorer George Vancouver, learned of Gray’s discovery and, pragmatically, utilized his maps. Vancouver’s expedition then proceeded to explore over 100 miles (160 km) up the Columbia, penetrating into the spectacular Columbia River Gorge . The maps and charts produced by these earlier maritime expeditions proved invaluable to Lewis and Clark, who relied on them extensively when they descended the lower Columbia to finally reach the Pacific coast, a testament to the cumulative nature of exploration.

Furthermore, from 1792 to 1793, the aforementioned Alexander Mackenzie had already achieved the remarkable feat of crossing North America from Quebec to the Pacific, an accomplishment that predated Lewis and Clark’s journey by more than a decade and served as a stark warning of British ambitions in the region.

See also

• Geography portal
• Modern history portal
• Science portal
• United States portal
• The Far Horizons , a 1955 film about the expedition
• Gateway Arch National Park
• Lewis and Clark Pass (Montana) – the only non-motorized pass on the expedition’s route
• Lewis and Clark’s Keelboat
• The Red River Expedition (1806) and the Pike Expedition were also commissioned by Jefferson
• James Kendall Hosmer , American history professor and librarian who edited and published Nicholas Biddle ’s account of Lewis and Clark’s journal
• Timeline of the Lewis and Clark Expedition

Notes

1. ^ ‘Chopunnish’ was the Captain’s term for the Nez Perce Pass
2. ^ After Wilkinson died in 1825, it was discovered that he was a spy for the Spanish crown. A rather charming detail for an American general, wouldn’t you say?
3. ^ aka the Hidatsa