Ken Maynard
— Ken Williams
Verna Hillie
— Jane Corwin
Hooper Atchley
— Dr. Edwards
Edward Hearn
— Lake
Syd Saylor
— Breezy Baker
Edward Earle
— Frank Blayden
Al Bridge
— Tom Henderson
Bob Kortman
— Rattler Henchman Hank
Lew Meehan
— Rattler Henchman Red
George Chesebro
— Rattler Henchman Anderson
Tom London
— Rattler Henchman Morgan
Lynton Brent
— Mathews, Telegrapher
Gene Autry
— Teamster Thomas (ch's 6-8) (uncredited)
Smiley Burnette
— Lake Teamster (ch's 6-7) (uncredited)
Tarzan
— Tarzan