William Beaudine Director Brian Keith William "Bill" Dunn Actor John Beal Maj. John Wesley Powell Actor James Drury Walter Powell Actor R. G. Armstrong Oramel Howland Actor Ben Johnson George Bradley Actor L.Q. Jones Billy "Missouri" Hawkins Actor Dan Sheridan Jack Sumner Actor David Stollery Andrew "Andy" Hall Actor Stan Jones Seneca Howland Actor David Frankham Frank Goodman Actor Lawrence Edward Watkin Screenwriter Walt Disney Producer James Algar Associate Producer Gordon Avil Cinematographer Norman R. Palmer Film Editing Cotton Warburton Film Editing Oliver Wallace Original Music Chuck Keehne Costume Design