lewis-and-clark

Updated: August 3, 2026

Two years after the return of the famous Lewis-and-Clark expedition, Andrew Henry "discovered" South Pass , and led his party through it into the Green River* Valley. His discovery consisted, like many others of the time, in following up the bison trails and the highways of the natives.

Frederick Samuel Dellenbaugh - The Romance of the Colorado River : The Story of its Discovery in 1840, with an Account of the Later Explorations, and with Special Reference to the Voyages of Powell through the Line of the Great Canyons