Follow the Corps of Discovery on their epic 8,000-mile expedition from St. Louis to the Pacific Ocean and back — through uncharted wilderness, across towering mountains, and along mighty rivers.
In 1803, President Thomas Jefferson commissioned Meriwether Lewis and William Clark to explore the newly acquired Louisiana Territory and find a route to the Pacific Ocean. Over the course of two years, the Corps of Discovery traveled more than 8,000 miles, documenting hundreds of new plant and animal species, mapping uncharted territory, and establishing relations with dozens of Native American tribes.
Their journey fundamentally transformed American understanding of the western frontier and paved the way for the nation's westward expansion. It remains one of the greatest exploration feats in history.
“We were now about to penetrate a country at least two thousand miles in width, on which the foot of civilized man had never trodden; the good or evil it had in store for us was for experiment yet to determine.” — Meriwether Lewis, April 7, 1805
Swipe through the major events of the two-year journey from St. Louis to the Pacific and back.
Meet the remarkable individuals who made the expedition possible.
Explore the full path of the Corps of Discovery across the American frontier.
The Corps endured extreme hardships throughout their journey.
Lewis and Clark documented hundreds of species previously unknown to science.
The expedition encountered dozens of Native American nations, each with rich cultures and traditions.
The tools and equipment that made the expedition possible.
How much do you know about the Lewis & Clark Expedition?