Flat Rock (Idaho) in ID -- Campground & RV Camping

Flat Rock Campground lies at 6,400 feet in Island Park, set in a lodgepole pine forest beside the Henry's Fork of the Snake River. The loop features gravel roads, single and double sites—some with 50-amp electric hookups—tent pads, campfire rings, utility tables, vault toilets, drinking water, and trash service. Popular for fly-fishing, canoeing, and floating, the site sits near the Big Springs National Recreation Water Trailhead. Island Park Reservoir, Henry's Lake, and the West Entrance of Yellowstone National Park are a short drive away.

Getting there: From West Yellowstone, Montana, take U.S. Highway 20 south for 22 miles, or from Ashton, Idaho, take U.S. Highway 20 north for 30 miles. The campground entrance is 1/4 mile south of Macks Inn on the west side of the highway.

• Little separation from through roads or other sites here, a 41-site campground with the nearest through road 0.1 miles off.
• Sits on broad, near-level ground.
• Henrys Fork Snake River runs 0.2 mi off.
• Estimated night sky: Bortle 4, a rural sky with a glow on the horizon.
• Sawtell Peak stands 3,449 ft above the map pin, 6.9 miles northwest.

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