Roy is a United States Marshal tracking down a counterfeiting ring and hunting down a mountain lion. Songs: "It's One Wonderful Day," "Rootin' Tootin' Cowboy," "Pancho's Rancho" and the title song.
Unfortunately the movie Twilight in the Sierras is not yet available on HBO Max.
| Sound | R. Dale Butts | Original Music Composer |
| Production | Edward J. White | Associate Producer |
| Camera | John MacBurnie | Director of Photography |
| Sound | Frank T. Dyke | Sound |
| Sound | Stanley Wilson | Original Music Composer |
| Sound | Nathan Scott | Original Music Composer |
| Costume & Make-Up | Adele Palmer | Costume Design |
| Art | James Redd | Set Decoration |
| Art | Frank Hotaling | Art Direction |
| Art | John McCarthy Jr. | Set Decoration |
| Editing | Tony Martinelli | Editor |
| Costume & Make-Up | Bob Mark | Makeup Artist |
| Costume & Make-Up | Steve Drumm | Makeup Artist |
| Costume & Make-Up | Hazel Keithley | Hairstylist |
| Writing | Sloan Nibley | Screenplay |
| Directing | William Witney | Director |
