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    National Expansion Memorial Missouri

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The Lewis and Clark Journey of Discovery

Thomas Jefferson's Grand Idea..Lewis and Clark's Great Adventure

"...the object of your mission is to explore the Missouri River, and such principal streams of is, as, by its course and
communication with the waters of the Pacific Ocean, whether
the Columbia, Oreon, Colorado or any other river, may offer the most direct and practicable water
communication across this continent for the purposes of commerce..."

Corps of Discovery banner with pictures of William Clark and Meriwether Lewis

Corps of Discovery

Learn about the people involved in the journey! Here we have short biographical sketches of Meriwether Lewis, William Clark, York, Sacajawea, Toussaint Charbonneau, Jean Baptiste Charbonneau "Little Pompey", and all the other members of the expedition.

Map of USA with text that says The Journey

The Journey

Learn about the journey of the Corps of Discovery. This section contains information about the native people that the Corps encountered, fossils, geography, mapmaking, science of the expedition and a photo album of places, plants and animals described in the journals.



The timelines in this section provide a chronological overview of the Lewis and Clark Expedition. They chronicle the major events of the expedition from April 20, 1803 to September 23, 1806.

Graphic of some of the educational topics in this section such as history, forensic science, mystery, art appreciation, Native Americans Languages, and secret codes.

Teacher Resources

Teacher resources on the Lousiana Purchase and Lewis and Clark Expedition. Here you will find curricula for K-12, information about what education was like in the Lewis and Clark era, and a curriculum built around Patrick Gass' journal.

Cahokia Court House

Cahokia Courthouse

Bicentennial Symposia
To commemorate the bicentennial of the Lewis and Clark expedition, Jefferson National Expansion Memorial held a series of four scholarly symposia on various topics related to the Louisiana Purchase, the Lewis and Clark expedition, early exploration in the West and other related topics. Click here to see the schedules, read speaker biographies, and see the full text of some of the papers presented.

Did You Know?

1843 letter

The Museum of Westward Expansion at the Jefferson National Expansion Memorial contains over 150 quotes from diaries, journals, letters and speeches. The designers of the museum felt the actual words of nineteenth century pioneers were the most powerful way to tell their story. Click to learn more. More...