Cunningham and his neighbor Si Ferrin helped organize a petition signed by 97 valley ranchers proposing a ranch buyout for a recreation area. Cunningham sold his land to the Snake River Land Company in 1928; the company later donated 35,000 acres toward expanding the park. The cabin is a small place with a surprisingly direct connection to how this landscape became protected.
There’s also a story of two suspected horse thieves shot at the ranch in 1892. Their guilt was never confirmed, and the man who claimed to be a U.S. Marshal was never verified as one, so treat that as an unresolved episode, not a settled outlaw story.