
The John Wesley Powell expedition of 1869 explores the dangerous Colorado River, withstands internal dissension, and finally discovers the Grand Canyon.

as William Dunn

as George Bradley

as Maj. John Wesley Powell

as Walter Powell

as Oramel Howland

as Billy Hawkins

as Jack Sumner

as Seneca Howland

as Frank Goodman

as Jim Baker

as Ashtishkel

as Indian chief

as Indian woman

as Andrew 'Andy' Hall

as McSpadden (uncredited)