USFS · Campground · Fee
Flat Rock Campground is located 22 miles south of West Yellowstone, Monta and 30 miles north of Ashton, Idaho in beautiful Island Park, Idaho. Flat Rock is adjacent to U.S. Highway 20 and the Henry's Fork of the Ske River at an elevation of 6,400 feet.
From the USFS.Official page
No. Flatrock Campground charges a fee. It is managed by the USFS. Sites are reservable through recreation.gov.
From West Yellowstone, Monta, travel 22 miles south on Highway 20.
No other services within 50 mi on the record.
SourceData from the USFS. Last synced September 18, 2026. Community reports and photos are submitted by travelers and are not verified by the agency.