Brian Keith

William Dunn

Ben Johnson

George Bradley

John Beal

Maj. John Wesley Powell

James Drury

Walter Powell

R.G. Armstrong

Oramel Howland

L.Q. Jones

Billy Hawkins

Dan Sheridan

Jack Sumner

Stan Jones

Seneca Howland

David Frankham

Frank Goodman

Roy Barcroft

Jim Baker

Jack Big Head

Ashtishkel

Pat Hogan

Indian chief

Dawn Little Sky

Indian woman

David Stollery

Andrew 'Andy' Hall

Ray Walker

McSpadden (uncredited)

William Beaudine

Director

John Wesley Powell

Writer

Lawrence Edward Watkin

Writer

Oliver Wallace

Music

Gordon Avil

Director of Photography

James Algar

Associate Producer

Walt Disney

Producer