The Hurley's own a lumber mill and want to harvest all the timber in the valley. They kill the Forester and substitute their brother Dusty in his place. Dusty then says all the trees are infected and must be cut down. But Rex Allen is suspicious and writes to the Forestry Department and gets involved with the murders.
You can now watch Colorado Sundown online on the following streaming providers in the United States.
| Editing | Tony Martinelli | Editor |
| Sound | R. Dale Butts | Original Music Composer |
| Writing | Eric Taylor | Story |
| Production | Edward J. White | Producer |
| Writing | William Lively | Screenplay |
| Writing | Eric Taylor | Screenplay |
| Directing | William Witney | Director |
| Camera | John MacBurnie | Director of Photography |
| Art | Frank Hotaling | Art Direction |
| Sound | Dick Tyler Sr. | Sound |
| Costume & Make-Up | Adele Palmer | Costume Supervisor |
| Art | John McCarthy Jr. | Set Decoration |
| Art | Charles S. Thompson | Set Decoration |
| Crew | Howard Lydecker | Special Effects |
| Crew | Theodore Lydecker | Special Effects |
| Costume & Make-Up | Bob Mark | Makeup Supervisor |
