Ring Hassard and his father Jeff, wild horse breakers, live in a hidden mountain eyrie as Jeff is wanted for a murder he didn't commit. Things change when they take in a lost young lady, Riley Martin, who finds that Ring has "never seen a woman close up." Jeff is injured, Ring runs afoul of horse thieves and the law, and Riley (who is a lawyer) labors to clear the Hassards (who others would prefer dead).
Unfortunately the movie Sierra is not yet available on HBO Max.
| Directing | Alfred E. Green | Director |
| Writing | Stuart Hardy | Novel |
| Writing | Edna Anhalt | Screenplay |
| Crew | Milton Gunzburg | Additional Dialogue |
| Art | Russell A. Gausman | Set Decoration |
| Art | John P. Austin | Set Decoration |
| Sound | Leslie I. Carey | Sound |
| Sound | Glenn E. Anderson | Sound |
| Costume & Make-Up | Joan St. Oegger | Hairstylist |
| Costume & Make-Up | Bud Westmore | Makeup Artist |
| Camera | Russell Metty | Director of Photography |
| Production | Michael Kraike | Producer |
| Sound | Walter Scharf | Music |
| Editing | Ted J. Kent | Editor |
| Art | Robert F. Boyle | Art Direction |
| Art | Bernard Herzbrun | Art Direction |
