On the Trail

August 18, 1803

Louisiana difficulties

In Washington City and New Orleans, private and encrypted letters are written regarding difficulties arising from the cession of Louisiana. One letter condemns the actions of the French colonial prefect in New Orleans, and the other questions the constitutionality of the Louisiana Purchase. In Pittsburgh, Lewis oversees construction of the expedition's military-style barge before departing down the Ohio River.

August 18, 1804

Trial and punishment

At Fish Camp near present Homer, Nebraska, Drouillard's party returns with deserter Pvt. Reed and some Otoes. At the ensuing trial, Reed is found guilty and sentenced to run a gauntlet four times. The Otoes witnessing the punishment ask for mercy. To celebrate Lewis's birthday, the enlisted men are given an extra gill of whiskey.

August 18, 1805

Searching for a navigable river

Clark, the Charbonneau family, several enlisted men, and many Lemhi Shoshone cross Shoshone Cove on their way to find a navigable branch of the Columbia River. Remaining at Fortunate Camp, Lewis writes a melancholy meditation on his 31st birthday.

August 18, 1806

The Mandan Creation Story

Despite windy conditions, the expedition reaches the Heart River—below present Bismarck, North Dakota—having made forty miles for the day. Sheheke (Big White) tells Clark the Mandan Creation Story and explains the history of the Mandans and Hidatsas.

Two army officers at Harpers Ferry ponder an iron frame in the shape of a large canoe

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.

Read more ↓

Day-by-Day Pages In-depth Articles


Five men and a large dog atop a hill above the Missouri River

Past the Omahas

21 July–20 August 1804

Following the Missouri River north along the present Nebraska-Iowa border, the expedition passes the homelands of the Otoes and Omahas. The captains pay their respects to the late Omaha Chief Blackbird and conduct their first two councils, one with the Otoes and another with the Omaha.

Read more ↓

Day-by-Day Pages In-depth Articles


York leads a horse, Sacagawea and the Captains ride

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.

Read more ↓

Day-by-Day Pages In-depth Articles


The white pirogue ad dugout canoes arrive at the French village of St. Charles.

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.

Read more ↓

Day-by-Day Pages In-depth Articles

Featured Members

    John Colter

    Private

    Colter left a legacy of western lore, not the least of which was his famous run from the Blackfeet Indians and his exploration of “Colter’s Hell.” Yet his contributions to the expedition were also many.

    Pierre Cruzatte

    Private

    Cruzatte’s skills in piloting boats were called on frequently during the expedition. As the main fiddle player, his music brought life to many a celebration. In addition, he could speak Omaha.

    John Thompson

    Private

    Sketch of two men cooking

    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

Featured Artist: Alfred Jacob Miller

John Mix Stanley Chromo Lithograph of the Bears Tooth

Pierre and the Buffalo in Jean Baptiste, Mountain Man.

Watercolor of a Shoshone warrior standing if front of an encampment

Snake Indian Camp in August 19, 1805.

Two Indians on horseback, one leaning far back

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…

More

    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.

    OPEN

     

    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.

    OPEN

     

    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!

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

    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.

    OPEN

     

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.

Logo: Lewis and Clark.travel

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.