On the Trail

April 5, 1804
A speech for the Iowas
At Camp River Dubois, Clark and Lewis write speeches to inform Iowa and Yanktonai People of the Louisiana transfer of ownership. They send the speeches with Des Moines River trader Lewis Crawford along with Jefferson's questions for Indians and vocabulary forms. They also send an invitation to visit Washington City.

April 5, 1805
Loading the small boats
The enlisted men load the red and white pirogues and six new dugout canoes, and all is made ready for departure. Sgt. Patrick Gass reflects the sexual practices experienced during his stay at Fort Mandan amongst the Knife River Villages.

April 5, 1806
Last day at Provision Camp
At Provision Camp near present Washougal, Washington, Nathaniel Pryor brings in the last of the elk jerky. Lewis says it is too wet and must be jerked again. Three "pett" bear cubs are brought to camp and traded for wapato. In Philadelphia, Charles Willson Peale reports on the pronghorn specimens that recently arrived from Fort Mandan.
Eastern Beginnings
10 January–30 August 1803
The Lewis and Clark Expedition ostensibly began in February 1801 when President Thomas Jefferson wrote a letter to Army commander General James Wilkinson requesting that Lieutenant Meriwether Lewis become the President’s personal secretary. Exploration of North America’s western half had long been a goal of the president, and now he had a young protégé who might lead such an expedition.
On 18 January 1803, Lewis hand-delivers to the U.S. Congress the President’s request to fund what would become known as the Lewis and Clark Expedition. The President works in Washington City and Monticello to craft instructions and line up the best talent to assist Lewis. In France, three diplomats negotiate with Napoleon Bonaparte to purchase the Louisiana Territory.
Meriwether receives training, supplies and equipment in Philadelphia and avails himself of armaments and specialized equipment—including a collapsable iron-framed boat—at the Schuylkill and Harpers Ferry arsenals. By July 1803, everything is at Fort Fayette in Pittsburgh. All Lewis needs is a large boat to carry everything down the Ohio. He also needs to know if William Clark will accept his invitation to join him.
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Winter at Wood River
12 December 1803–13 May 1804
In mid-December 1803, construction of winter quarters begins. In accordance with the wishes of the Spanish Governor, Lewis could work in St. Louis and the soldiers could build a garrison in Illinois across from the mouth of the Missouri. The Wood river cantonment is known today as Camp River Dubois.
In St. Louis, Lewis learns about the Missouri River from established St. Louis traders and purchases more Indian gifts and equipment from local merchants. Across the river, the captains would need ot establish military discipline and the soldiers would need to become a team.
Both captains and key personnel cross the Mississippi frequently, and in March, Lewis and Clark witness the official transfer of Upper Louisiana from Spain to France. One day later, France transfers the territory to the United States.
With the arrival of several St. Charles
French boatmen from St. Charles on 11 May 1804, departure up the Missouri is imminent.
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Winter at Fort Mandan
26 October 1804–6 April 1805
On 2 November 1804 below the Knife River Villages, work begins on the expedition’s winter fortification. The men’s quarters, storage rooms, and the 16-foot pickets, are designed for defense against hostile Indians, especially the Sioux, who would be quite troublesome, although they never attacked the fort directly. “This place we have named Fort Mandan,” Lewis recorded, “in honour of our Neighbours”—their kind and congenial Mandan Indians. Here they celebrate their second Christmas and New Year’s Day.
On 28 February 1805, sixteen enlisted men are assigned to hew six canoes from cottonwood logs, and they finish them in 22 days. Meanwhile, the rest of the men make rope, leather clothing and moccasins, cured meat, and battle axes to trade for corn. Lewis prepares botanical, zoological, and mineralogical specimens for shipping back to President Jefferson. Clark works on his Fort Mandan maps.
By the time they are ready to leave Fort Mandan, they add some key members to the permanent party: Toussaint Charbonneau, his wife and infant son—Sacagawea and Jean Baptiste, and French trader Jean-Baptiste Lepage. Each would play critical roles in the expedition’s journey to the Pacific Ocean.
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Return to the Clearwater
23 March–9 June 1806
The desire to return to St. Louis motivates the paddlers as they head up the Columbia River. Across from the Sandy River, they stop to hunt and dry meat. They explore the Willamette and Sandy hoping that one of them is the fabled river that comes from California.
Below Celilo Falls, they begin trading for horses and by the time they reach the Walla Walla River, they have enough horses to take the overland Travois Trail back to the Snake River. They then continue by horse up the Clearwater River.
At Kamiah in present Idaho, they establish a “Long Camp” among the Nez Perce to wait for mountain snows to melt. Sgt. Ordway takes a side trip to the Salmon and Snake rivers where some Nez Perce fishers are catching salmon.
After five weeks sharing with the Nez Perce, they head to the mountain trails that will take them to the land of the buffalo.
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Featured Members


Labiche performed all the regular duties of an army private, but also performed well as a French and English interpreter. He would continue serving as an escort with Lewis for Chief Sheheke’s delegation to Washington City.
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Silas Goodrich was the expedition’s principal fisherman. He also did well when trading for food with Indians from time to time.
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At Long Camp, Potts nearly drowned when the dugout canoe he was in was swamped in the Clearwater River. But Potts’s worst accident happened when the Corps retraced the Northern Nez Perce Trail through the Bitterroots.
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Quick Links
Meriwether Lewis
William Clark
Sacagawea
York
Jean Baptiste Charbonneau
Seaman
All Members
Native Nations Encountered
Featured Artist: William Birch
City and Port of Philadelphia
Old Lutheran Church (Philadelphia)
Independence Hall (State House)
The artist William Russell Birch (1755–1834) emigrated from England to Philadelphia in 1794. A first edition copy of his famous The City of Philadelphia . . . as it appeared in the Year 1800 was on display in the office of subscriber Thomas Jefferson, as it would be throughout his presidency. Birch’s hand-colored engravings are used at the Discovering Lewis & Clark website to show Philadelphia as appeared to Meriwether Lewis when he took up residence there in early 1803 to purchase supplies and receive training from Jefferson’s hand-picked mentors.
Artist Bio and Index
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Given President Jefferson’s directive to establish commerce, the captains worked extensively within a long-established network of North American fur trade. Part of their mission was to help establish the United States of America’s position within that industry.
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Explore the methods they used to get stuff done—from building canoes to making rope.
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Although hunting and fishing were often considered a ‘gentleman’s sport’ especially in Europe, hunting and fishing for Native Americans and Americans alike were a matter of survival. The success of the Lewis and Clark Expedition depended on the success of its hunters.
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Lewis and Clark were among several significant explorers of North America both before and after the expedition.
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Their work in the emerging fields of botany, ethnography, geography, geology, and zoology are now considered classics of early American scientific literature.
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From major crisis such as the death of Sgt. Floyd, Lewis’s gunshot wound, and the illness of Sacagawea to minor events such as sexually transmitted diseases, mosquito-born illnesses, and deep cuts, the medical aspects of the Lewis and Clark Expedition provide an interesting topic of study.
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The Lewis and Clark Expedition benefited from the Indians’ knowledge and support. Maps, route information, food, horses, open-handed friendship—all gave the Corps of Discovery the edge that spelled the difference between success and failure.
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The entire story is told in these five webpages.
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Lewis and Clark left behind among many Indians a legacy of nonviolent contact. Those who came later enjoyed that legacy and too often betrayed it.
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Because of the literate journalists, historians and visual artists can tell the Expedition’s story. When they celebrated with song and dance, we too can share in the experience.
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Learn about the people—and one dog—who were members of the Lewis and Clark Expedition.
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From clichés and colorful sayings of the time to Native American languages, these pages feature the art of language.
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The President’s representatives in Paris had bargained successfully with Napoleon’s bureaucrats not only to buy the port of New Orleans, then the keystone of the continent, but also to acquire, at three cents an acre, an area extending from the Mississippi River to . . . where? No one knew until Meriwether Lewis stood at the crest of the Rocky Mountains at a place known today as Lemhi Pass, on 12 August 1805.
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Other topics include music, holidays, High Potential Historic Sites, and an index of articles from We Proceeded On.
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Legacy is a very slippery sort of term. If we could erase our myth concepts of Lewis and Clark … it might reawaken something really extraordinary in our national consciousness.
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Starting with its genesis in Jefferson’s Monticello, Lewis’s training and preparations in Philadelphia, and the barge’s excursion down the Ohio River, the route they took, often called the Lewis and Clark Trail, crosses the continent weaving an epic tale of western exploration treasured by many today.
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The success of the Lewis and Clark Expedition was due to its many members and the people they met, including politicians, Eastern gentleman scientists, traders, and the many people already living in the American west.
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Links to every day-by-day page in a calendar format spanning 31 August 1803 to 26 September 1806. A page every day!
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Starting at Pittsburgh, traveling to the Pacific Ocean, and then returning to St. Louis, the Lewis and Clark Expedition traveled approximately 10,600 miles. Of that, 85%—over 9,000 miles—was by boat. To understand travel in the early 1800 American West is to understand the boats and challenges of river navigation.
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To cross the Rocky Mountains, the Lewis and Clark Expedition needed horses and the skills to manage them. Despite their seemingly constant struggle to find missing and stolen horses, as a kind of calvary unit, they left hoof prints on approximately 1,500 miles of western terrain.
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Throughout the expedition the soldiers were expected to conform to the rules and routines of the frontier soldier of 1803.
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Discover More
- The Lewis and Clark Expedition: Day by Day by Gary E. Moulton (University of Nebraska Press, 2018). The story in prose, 14 May 1804–23 September 1806.
- The Lewis and Clark Journals: An American Epic of Discovery (abridged) by Gary E. Moulton (University of Nebraska Press, 2003). Selected journal excerpts, 14 May 1804–23 September 1806.
- The Lewis and Clark Journals. by Gary E. Moulton (University of Nebraska Press, 1983–2001). The complete story in 13 volumes.