Flat Rock Campground is a small, rustic 6-site campground along the Yankee Fork of the Salmon River in Salmon-Challis National Forest, offering first-come, first-served camping at $10/night with picnic tables and fire pits at each site.

The campground accommodates RVs and trailers up to 32 feet and provides vault toilets and hand-pump water, making it a convenient base for fishing and accessing nearby rafting/kayaking on the main Salmon River.

Located 2 miles up Forest Road 013 from Highway 75 near Sunbeam Dam, it's centrally positioned near the historic Yankee Fork mining district and multiple recreation opportunities in the area.