Mystery Mountain

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