>>2722982I'm not OP, but here is an example that I encountered.
This one in Inyo NF, the owners do grant access though. Even more confusing is the adjacent trail, pine creek trail you must walk through about 25 feet of stables/buildings. But the pine creek trail is clearly all Inyo FS property. The gable lakes trail according to the map starts entirely on private property but looks like a typical trailhead parking lot.