Portion of William Clark's map, published 1814.
Portion of William Clark's map, published 1814.

Library of Congress

The members of the Corps of Discovery traveled over 3700 miles between May of 1804 and September of 1806. Their journey followed the courses of the Missouri and Columbia rivers. They crossed the Rocky and Bitteroot Mountains. They saw the Pacific Ocean. Although the lands they traveled were largely unknown to Euro-Americans, many American Indian tribes had called these places home for centuries.

Trail leading to fort surrounded by trees.

Fort Clatsop

Fort Clatsop in Astoria, OR.

Entrance sign with Spirit Mound in the background.

Spirit Mound

Spirit Mound located near Vermillion, SD.

Large rock structure with storm clouds behind it.

Beaverhead Rock

Beaverhead Rock near Dillion, MT.

Entrance to wooden fort.

Camp River Dubois

Replica of Camp Dubois near Wood River, IL.

Picture of the interactive map
Trail Interactive Map


Interactive Trail Atlas

Personalize your trail exploration by discovering exciting trail themes with this interactive map. Travel to Lewis and Clark campsites, learn about the historic river, and dynamically display different map backgrounds of your choice. Users can:

  • Zoom in and out of areas of interest and decide the geographic extent and scale at which they want to view the trail
  • Turn layers of information on and off in the table of contents
  • Display different backgrounds (e.g. aerial photos, topographic maps, streetmaps) and control the transparency of imagery backgrounds
  • Draw and add text to directly on the web map and export and print these as custom maps
  • Measure distance, area, and add their own GIS and GPS data to the web map
  • Click on links to get more information on the web as well
  • Open and view locations in Google Maps and Google Earth Streetview

Last updated: January 31, 2017

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