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William Boyd as William "Hopalong" Cassidy |
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Andy Clyde as Clarence "California" Carlson |
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Rand Brooks as Lucky Jenkins |
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Elaine Riley as Anne Larson |
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Joel Friedkin as Prof. Alonzo Larson |
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Kenneth MacDonald as Nat Bentley |
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Cliff Clark as Gerald Waite |
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Don Haggerty as Deal Marden, chief henchman |
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Richard Alexander as Miner-Henchman Buck |
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Zon Murray as Miner-Henchman Sam |
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George Eldredge as Mr. Radley |
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William Bailey as Mine Foreman |
| Directing | George Archainbaud | Director |
| Sound | Raoul Kraushaar | Music |
| Camera | Mack Stengler | Director of Photography |
| Production | Lewis J. Rachmil | Producer |
| Art | Jerome Pycha Jr. | Art Direction |
| Sound | Earl Sitar | Sound |
| Art | George Sawley | Set Decoration |
| Costume & Make-Up | Earl Moser | Costume Designer |
| Writing | Clarence E. Mulford | Characters |
| Writing | Harrison Jacobs | Screenplay |
| Crew | William Conselman Jr. | Additional Dialogue |
| Crew | Doris Schroeder | Additional Dialogue |
