"Hoppy, Lucky and California search for a mine owned by Trudy Pendleton after it was taken from her by thw swindling gambler Ace Gibson. They find the mine and Hoppy fights Gibson over it."
William Boyd
as Hopalong Cassidy
Russell Hayden
as Lucky Jenkins
Andy Clyde
as California Carlson
Eleanor Stewart
as Trudy Pendleton
Morris Ankrum
as Ace Gibson
William Haade
as Bill Watson
Dennis Moore
as Jud Carter
Henry Hall
as John Blake
Britt Wood
as Ben Pendleton
Silver Tip Baker
as Barfly
Rudy Bowman
Bob Card
as Gambler
Jack Hendricks
Bruce Mitchell
as Charlie
Chuck Morrison
as Gabby Cowhand
Tex Parker
Cliff Parkinson
as Henchman
Jack Rockwell
as Liveryman
Phil Schumacher
Dick Simmons
as Cheated Gambler
Tom Smith
George Sowards
as Wounded Henchman
Chief Thundercloud
as Flying Cloud
Henry Wills
Wen Wright
as Tall Henchman
Lesley Selander
Director
Russell Harlan
Cinematography
Sherman A. Rose
Editor
Lewis J. Rachmil
Art Direction
Harry Sherman
Producer
Carroll Lewis
Ethel La Blanche
Screenplay
Clarence E. Mulford
Characters
J. Benton Cheney