![A map of Lewis and Clark's track, across the western portion of North America from the Mississippi to the Pacific Ocean : by order of the executive of the United States in A map of Lewis and Clark's track, across the western portion of North America from the Mississippi to the Pacific Ocean : by order of the executive of the United States in](http://tile.loc.gov/image-services/iiif/service:gmd:gmd412:g4126:g4126s:ct000028/full/pct:12.5/0/default.jpg)
A map of Lewis and Clark's track, across the western portion of North America from the Mississippi to the Pacific Ocean : by order of the executive of the United States in
![The Lewis and Clark Expedition Began in Pittsburgh. And Soon the Historic Trail Might, Too. - The Allegheny Front The Lewis and Clark Expedition Began in Pittsburgh. And Soon the Historic Trail Might, Too. - The Allegheny Front](https://www.alleghenyfront.org/wp-content/uploads/2018/05/lewisandclark.jpg)
The Lewis and Clark Expedition Began in Pittsburgh. And Soon the Historic Trail Might, Too. - The Allegheny Front
![The Lewis and Clark Expedition, 1803 to 1806, A Portrait of Army Leadership - Lewis and Clark - Corps of Discovery - U.S. Army Center of Military History The Lewis and Clark Expedition, 1803 to 1806, A Portrait of Army Leadership - Lewis and Clark - Corps of Discovery - U.S. Army Center of Military History](https://history.army.mil/lc/the%20mission/lc_pamphlet/25.jpg)