Cpt. Meriwether Lewis
Lt. William Clark
Sacajawea
Julia Hancock
Sgt. Gass
Charbonneau
Chief Cameahwait
Wild Eagle
President Thomas Jefferson
Mr. Hancock
Shoshone Woman (uncredited)
Crow Woman (uncredited)
Chief Le Borgne (uncredited)
Night Camp Sentry (uncredited)
Helmsman Cruzatte (uncredited)
Tom (uncredited)
Mrs. Martha Hancock (uncredited)