Fred MacMurray
Cpt. Meriwether Lewis
Fred MacMurray
Cpt. Meriwether Lewis
Charlton Heston
Lt. William Clark
Donna Reed
Sacajawea
Barbara Hale
Julia Hancock
William Demarest
Sgt. Gass
Alan Reed
Charbonneau
Eduardo Noriega
Chief Cameahwait
Larry Pennell
Wild Eagle
Herbert Heyes
President Thomas Jefferson
Lester Matthews
Mr. Hancock
Argentina Brunetti
Shoshone Woman (uncredited)
Julia Montoya
Crow Woman (uncredited)
Ralph Moody
Chief Le Borgne (uncredited)
William Phipps
Night Camp Sentry (uncredited)
Walter Reed
Helmsman Cruzatte (uncredited)
Bill Walker
Tom (uncredited)
Helen Wallace
Mrs. Martha Hancock (uncredited)
Rudolph Maté
Director
Sam Comer
Set Decoration
William Williams
Second Unit Director of Photography
Charles C. Coleman
Second Unit Director
Donald R. O. Hatswell
Technical Advisor
Hans J. Salter
Original Music Composer
A. Earl Hedrick
Art Direction
Gene Merritt
Sound Recordist
John P. Fulton
Visual Effects
Winston Miller
Screenplay
Hal Pereira
Art Direction
William C. Thomas
Producer
Daniel L. Fapp
Director of Photography
William McGarry
Assistant Director
Gene Garvin
Sound Recordist
Otto Siegel
Set Decoration
William H. Pine
Producer
Wally Westmore
Makeup Supervisor
Edmund H. North
Screenplay
Edith Head
Costume Design
Della Gould Emmons
Novel
Frank Bracht
Editor
Bob Herron
Stunts