Noah Beery Jr.
— Stormy
Jean Rogers
— Kerry Dorn
J. Farrell MacDonald
— Trinidad Dorn
Raymond Hatton
— Stuffy
Walter Miller
— Craig
Fred Kohler
— Deem Dorn
James P. Burtis
— Greasy
Rex
— Rex (as Rex King of Wild Horses)
Rex Junior
— Rex as a Colt (as Rex Jr.)
Buck Bucko
— Cowhand (uncredited)
Roy Bucko
— Cowhand (uncredited)
Edmund Cobb
— Brakeman (uncredited)
W.H. Davis
— Mr. Dearman (uncredited)
Art Dillard
— Cowhand (uncredited)
Bert Dillard
— Cowhand (uncredited)
Chester Gan
— Chinaman (uncredited)
Robert Homans
— Train Conductor (uncredited)
Wilfred Lucas
— Mack's Horse Trainer (uncredited)
Cliff Lyons
— Cowhand (uncredited)
Cactus Mack
— Arizona Wranglers Band Member Cactus (uncredited)
Sam McDaniel
— Mack's Hostler (uncredited)
Monte Montague
— Cowhand (uncredited)
Bud Osborne
— Cowhand (uncredited)
Jimmy Phillips
— Cowhand (uncredited)
Harry Woods
— Mack - Red Wing's Owner (uncredited)
Glenn Strange
— Arizona Wranglers Band Member 'Peewee' Strange (uncredited)