Colorado Trail (1938)

In this western a traveling gun ends up in a small town and rescues an important rancher. Out of gratitude the rancher hires him to protect his land and cattle from his violent rival. It is revealed that the gunman is the son of the ruthless rival; he therefore, loses his job and finds himself entangled in the midst of a range war. He must eventually face his father when the bad guy takes over the only trail to the market.

Unfortunately the movie Colorado Trail is not yet available on HBO Max.