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)
