Monte Hale Western #61 (1951)

Monte Hale and Sheriff Ray Evans set a trap for outlaws planning to rob a stagecoach at Owl Creek Bridge by hiding dynamite beneath the structure. When the masked rustlers attempt the holdup, Monte and the sheriff ambush them, triggering an explosion that scatters the criminals. Gabby Hayes pursues one of the fleeing outlaws on horseback, chasing him across the desert while the rustler tries to shake off his pursuer using various tactics including a swarm of insects. After a chaotic pursuit involving a buffalo stampede that nearly tramples the chase participants, the outlaw is finally captured.