On the Trail
August 22, 1803
Ohio flatboat men
As he waits in Pittsburgh for the expedition's barge to be completed, Lewis likely sees many Ohio River flatboat men heading down the river—and wishes he could too.
August 22, 1804
Gass elected sergeant
The enlisted men sail the boats about twenty miles up the Missouri stopping southeast of present Vermillion, South Dakota. While investigating some minerals, Lewis is overcome by caustic fumes. Pvt. Patrick Gass is elected to replace Sgt. Charles Floyd who recently died.
August 22, 1805
Down the Salmon
Drouillard returns to Fortunate Camp with a bag of roots that a Lemhi Shoshone family left behind, and Lewis describes the foods it holds. Midday, Cameahwait's People arrive, and he and Lewis exchange food and horses. Clark is on the Salmon River looking for a place to make canoes, but high hills lining the river make travel difficult. He describes [...]
August 22, 1806
An engagé re-joins
Above present Mobridge, South Dakota, the Arikara and Cheyenne chiefs decline the captains' invitations to travel with them to Washington City. A Cheyenne chief asks that fur traders come to his nation, and a down-on-his-luck engagé from last year's journey up the Missouri re-joins. They move a few miles down the river and encamp.
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.
Day-by-Day Pages In-depth Articles
Among the Yanktons
21 August–8 September 1804
Moving along the present border between Nebraska and South Dakota, the expedition turns its ‘enlightened‘ attention to several features in the upper Missouri River mythology.
Instead of a volcano, they find blue earth, cliffs of white marl, and burning bluffs. Lewis becomes ill while testing one of the minerals he found. Instead of La Véndrye’s Golden Sands, they find hills of wind-blown loess. Instead of a Spirit Moundmountain of little people and devilish spirits, they find birds feeding on pissants atop present Spirit Mound.
Pvt. George Shannon fails to return from a hunting trip, and Patrick Gass is promoted to sergeant. At Calumet Bluff, their attention turns to receiving the Yankton Sioux. For two days, a council with speeches, gifts, songs, and dances is held.
At Old Baldy—present The Tower in South Dakota—everybody but the camp guard visits a prairie dog town, and they manage to capture one as a live specimen. He would travel to the Knife River Villages, Washington City, and reside in Peale’s Museum in Philadelphia.
Their encounters here had been encouraging, but Shannon is still missing, and the Lakota Sioux homelands are just ahead.
Day-by-Day Pages In-depth Articles
Down the Western Valleys
11 August–10 September 1805
Having reached the end of the navigable Missouri, the captains—aided by Lemhi Shoshone Chief Cameahwait, Sacagawea‘s brother—begin acquiring horses, making pack saddles, and caching supplies they can no longer take with them.
With the help of the Lemhi Shoshones, everything is carried across the Continental Divide. Clark and their new guide they call Toby, scout the Salmon River and find it is not navigable.
After nearly three weeks with the Shoshones, the expedition moves down the Lemhi River valley and heads up the North Fork Salmon River. The captains ignore Toby’s advice to follow the Indian Road, and they are forced to spend a snowy night near the summit of Lost Trail Pass.
Dropping down from Lost Trail Pass, the Flathead Salish give them a warm welcome and sell them some horses. The expedition then proceeds down the Bitterroot River Valley to Travelers’ Rest where they have yet to cross the Bitterroot Mountains.
Day-by-Day Pages In-depth Articles
The Final Leg
11 August–26 September 1806
While hunting on the Missouri River below present Williston, North Dakota, Lewis is accidentally shot through the flesh of his buttocks. The next day, they catch up to Clark’s party at Reunion Bay. As one united force, they are ready to sprint down the river to St. Louis.
At the Knife River Villages, they drop off the Charbonneau family and pick up Chief Sheheke and interpreter René Jusseaume who will visit Washington City.
The faithful paddlers meet several traders and receive flour, whiskey, woven shirts, and most importantly, news of the United States.
On 23 September 1806, the citizens of St. Louis—having given them up for dead—provide a boisterous welcome. The captains commence writing.
Day-by-Day Pages In-depth Articles
Featured Members
George Gibson
Private
The captains sent four men to retrieve Gibson, “who is so much reduced that he cannot stand alone and…they are obliged to carry him in a litter.” They arrived on February 15, and Lewis went to work sweating the “veery languid” Gibson with saltpeter and dosing him with laudanum for sleep.
Patrick Gass
Sergeant
Starting out as a private with a specialty of carpentry, Gass was soon elected a sergeant after the death of Sergeant Charles Floyd. His was the first expedition journal to be published. He was also the last surviving member.
John Thompson
Private
On 8 October 1805, the canoe split open and took on water. The Corps encamped for two days to dry out the goods, allowing Thompson to heal a bit.
Quick Links
Meriwether Lewis William Clark Sacagawea York Jean Baptiste Charbonneau Seaman All Members
Native Nations Encountered
Northwest Coast
Plateau / Southwest
Northeast
Featured Artist: Alfred Jacob Miller
Pierre and the Buffalo in Jean Baptiste, Mountain Man.
Snake Indian Camp in August 19, 1805.
Blackfeet on the Warpath in The Blackfeet Confederacy
Miller’s reputation rests on his single Green River Rendezvous trip from which he transformed his original sketches and notes into a lifetime of images. His work preserves details of clothing, equipment, camps, transport, and performance. At the same time, his images were made for patrons who valued romance and spectacle. For that reason, Miller should be read carefully.
More
Calendar
Expedition Calendar
Links to every day-by-day page in a calendar format spanning 31 August 1803 to 26 September 1806. A page every day!
A Military Corps
Throughout the expedition the soldiers were expected to conform to the rules and routines of the frontier soldier of 1803.
Medicine on the Trail
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.
Legacies
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.
Louisiana’s Purchase
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.
The Arts
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.
Synopsis of the Expedition
by Harry W. Fritz
Trail Diplomacy
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.
The Trail
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.
Horse Travel
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.
Language
From clichés and colorful sayings of the time to Native American languages, these pages feature the art of language.
The Boats
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.
Tools and Techniques
Other Topics
Other topics include music, holidays, High Potential Historic Sites, and an index of articles from We Proceeded On.
Related Explorers
Lewis and Clark were among several significant explorers of North America both before and after the expedition.
Scientific Explorations
Their work in the emerging fields of botany, ethnography, geography, geology, and zoology are now considered classics of early American scientific literature.
Hunting and Fishing
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.
The Fur Trade
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.
People
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.
Native American Nations
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.
Experience the Lewis and Clark Trail
The Lewis and Clark Trail Experience—our sister site at lewisandclark.travel—connects the world to people and places on the Lewis and Clark Trail.
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.
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