What’s actually in development
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Beth & Rip spinoff (often mislabeled as Rio Palo) is indeed in production—but it’s not called Rio Palo. That was just a working title or misnomer. The show, starring Kelly Reilly and Cole Hauser, is filming in Ferris, Texas, but the official title hasn’t been revealed yet.chron.comau.lifestyle.yahoo.comIMDb
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Y: Marshals, starring Luke Grimes as Kayce Dutton, is confirmed to debut in spring 2026 on CBS. This procedural-style spinoff explores Kayce’s new life as part of an elite U.S. Marshals unit.EW.com+1People.com
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The Madison, set in Montana and featuring a brand-new family led by Michelle Pfeiffer, is another confirmed spinoff focusing on grief and human connection.Wikipediachron.com
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Additional known titles in the Sheridan-verse include 1944, 6666, and the Beth & Rip project, all at various stages of development.chron.comDeciderMySAPeople.com
Bottom Line: What’s not happening
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There is no secret spinoff that’s entirely new or unrelated—and certainly none emerging under the title Rio Palo.
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The rumors about a “crazy” or surprise project named Rio Palo amount to misreports or early production placeholders that were never meant for public confirmation.Country LivingSoapCentral
Summary Table
| Claim | Reality |
|---|---|
| Yellowstone secret spinoff “Rio Palo” | Not a real title—just a working/placeholder name for the Beth & Rip series |
| New, completely unannounced series | No credible evidence exists of such a project |
| Beth & Rip spinoff | Confirmed—filming in Texas, title TBD |
| Other known spinoffs | Y: Marshals, The Madison, 1944, 6666 are all in development or production |
