Public LandU.S. Forest ServiceBig rigs OK

Flat Rock (Idaho)

Island Park, Idaho · 6,430 ft · In Caribou-Targhee National Forest

Reserve on Recreation.govSuggest an edit

At a glance

5 of 8 facts known · recreation.gov, checked Sep 24, 2026

Price per night: $25–$62recreation.gov, checked Sep 24, 2026
Sites: 16From recreation.gov's site list · Oct 2026
Hookups: PartialElectric 50 amp, no water, no sewerFrom recreation.gov · Aug 2026
Elevation: 6,430 ft (1,960 m)6,430 ft1,960 m
Pets: Not yet known
Big rigs: Yes
Season: Not yet known
Cell signal: Not yet known

Sites16

Flat Rock (Idaho) lists no loops, so its sites are listed here. Pick a site to see its details.

Site	Type	Longest rig	People
B002	Standard	45 ft	8
B003	Standard	45 ft	8
B004	Standard	45 ft	8
B005	Standard	45 ft	8
B006	Standard	45 ft	8
B007	Standard	50 ft	8
B008	Standard	50 ft	8
B009	Standard	50 ft	16
B010	Standard	45 ft	8
B011	Standard	50 ft	8

Showing 10 of 16 · by site number

From recreation.gov's site list, Oct 10, 2026: 25 staff entries left out.

Amenities

From Recreation.gov, Recreation.gov — campground rate cards · Correct

Campfires allowed

From Recreation.gov, Recreation.gov — campground rate cards

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About

Overview

Flat Rock Campground is located 22 miles south of West Yellowstone, Montana 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 Snake River at an elevation of 6,400 feet. Recreation

Henry's Fork has great fly-fishing for rainbow and brook trout. The river's headwaters are at Big Springs, one of the nation's largest springs, just 4.5 miles from the campground. Tubing, canoeing, kayaking and rafting are also popular on the river.

From Recreation.gov and Recreation.gov — campground rate cards · · Edit