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The sixth of the Hopalong Cassidy films, with the story source credited to Clarence E. Mulford's "Mesquite Jenkins, Tumbleweed", finds Hopalong Cassidy and his young pal, Johnny Nelson, leaving their Bar 20 home range to answer a letter offering them jobs on the Tumbling-L Ranch of Big John Trumbull near Yucca. Before they arrive in town, they save an old wrangler named Windy from drowning, who has been fired on from ambush as he was delivering a valuable stud bull to the depot. Windy, whose sole trusted weapon is a blacksnake whip, tells them he works for the Three-J Ranch adjoining Trumbull's spread. Hoppy and Johnny soon learn that Trumbull's outfit isn't the kind they want to work for, turn down the job offer, and take work with the Three-J, operated by easterner Jim Jordan and his sister Sally. Jordan is planning on fencing in his grazing land, but Trunbull swears this won't happen because, unknown to the other ranchers, Trumbull's men have been driving rustled cattle through a pass on the Jordan land. Hoppy and Johnny aid Jordan in getting his fence up, while Trumbull's men first try to stop them by gun warfare and then by starting a stampede of rustled cattle toward the narrow pass where the fence is being erected. Hoppy dynamites a dam, releases a torrent of water, and then succeeds in turning back the herd on the rustlers. The troubles at the Three-J are over and Hoppy and Johnny head back to the Bar 20.

How to Watch Heart of the West Legally and Safely

If you want to stream Heart of the West through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Heart of the West films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.