Twentymile Bar Campground is a free, primitive dispersed camping site in Nez Perce National Forest located 10 miles up the Selway River from Lowell, Idaho, offering 2 tent sites with a toilet facility and beach access.

The campground provides fishing access and is open June through November, making it ideal for anglers and river enthusiasts seeking a remote backcountry experience. Note that there is no cell phone coverage from any major carrier at this location.