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No sooner had the second of Monogram's "Range Riders" westerns hit the screens than the third entry, West of Pinto Basin, was prepared for release. Once again, the Range Riders are portrayed by Ray "Crash" Corrigan, John "Dusty" King and Max "Alibi" Terhune, who this time are hot on the trail of a stagecoach holdup gang. Outlaw leader Harvey (Tris Coffin) is able to monitor the routes taken by the local stage line thanks to a "fifth columnist" named Summers (Phil Dunham), an outwardly honest bank employee. The three heroes take jobs as stagecoach drivers to bring the villains out into the open. The romantic interest is handled by Gwen Gaze, previously a minor-league serial heroine.