Kermit Maynard
— Mountie Sergeant Mack MacKenzie
Eleanor Hunt
— Beth Braden
Russell Hopton
— Duke Milford
J. Farrell MacDonald
— Inspector
LeRoy Mason
— Stone
Gertrude Astor
— Mae
Ben Hendricks Jr.
— Sam Keene
Walter Brennan
— Stuttering Cook
Lloyd Ingraham
— Prof. Braden
Nelson McDowell
— Tope
Lafe McKee
— Old Trapper
Chris Willow Bird
— Indian Henchman (uncredited)
Jack Chisholm
— Henchman Durkin (uncredited)
Kernan Cripps
— Mike - the Bartender (uncredited)
Dick Curtis
— Henchman Pete (uncredited)
Henry Hall
— Old Trapper #2 (uncredited)
Charles King
— Mountie Wallace (uncredited)
Artie Ortego
— Henchman Gareau (uncredited)
Tyrone Power
— Mountie (uncredited)
Rocky
— Mack's Horse (uncredited)