56 campgrounds that take vehicles of 40 feet or more in Montana

More of them sit in Custer Gallatin National Forest than anywhere else in the state. Hellgate Campground takes the longest rig in Montana at 120 feet. The Forest Service runs more of them than any other agency.

A campground is listed when the longest permitted vehicle in its Recreation.gov site records is 40 feet or more. The figure is the longest single site, so most sites at a listed campground are shorter.