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188 reviews
Flat Rock Campground in Idaho offers a clean and well-maintained environment with spacious campsites and beautiful surroundings, making it a great spot for families and outdoor enthusiasts. Many reviews highlight the helpfulness of camp host Annie, who is praised for her dedication to maintaining the campground. However, some guests report issues with noise from the nearby highway and mixed experiences with camp hosts, suggesting improvements in host interactions and garbage management would enhance the overall experience.
Based on guest feedback
4.3
Based on 188 reviews
Showing 188 reviews
September 10, 2025 Stayed at: B007, Loop: FLAT
Nice level long campsites. Shady, limited cellular. Camp host keeps things clean, but is very bear aware, so very anxious about materials outside your camper.
As others have mentioned, road noise is significant.
Helpful
September 10, 2025 Stayed at: B016, Loop: FLAT
Stinky bathrooms, bad but other than that, a nice place to stay.
Helpful
September 10, 2025 Stayed at: B007, Loop: FLAT
Nice level long campsites. Shady, limited cellular. Camp host keeps things clean, but is very bear aware, so very anxious about materials outside your camper.
As others have mentioned, road noise is significant.
Helpful
September 9, 2025 Stayed at: B007, Loop: FLAT
The host did an excellent job of taking care of the campground and all the campers
Helpful
September 9, 2025 Stayed at: B007, Loop: FLAT
The host did an excellent job of taking care of the campground and all the campers
Helpful
August 28, 2025 Stayed at: B009, Loop: FLAT
Great location, nice sites, most are heavily treed … some sites reservable, some with water and electricity. Others are “First Come”. Very convenient to access Mack’s Inn area and for floating the Henry’s Fork - you can literally take out by the campground. However, road noise from Hwy 20 is significant.
Helpful
August 28, 2025 Stayed at: B009, Loop: FLAT
Great location, nice sites, most are heavily treed … some sites reservable, some with water and electricity. Others are “First Come”. Very convenient to access Mack’s Inn area and for floating the Henry’s Fork - you can literally take out by the campground. However, road noise from Hwy 20 is significant.
Helpful
August 25, 2025 Stayed at: B011, Loop: FLAT
Camp host very welcoming and talkative. Camp is kept neat and organized
Helpful
August 25, 2025 Stayed at: B011, Loop: FLAT
Camp host very welcoming and talkative. Camp is kept neat and organized
Helpful
August 17, 2025 Stayed at: B013, Loop: FLAT
Great place, large sites
Helpful
Highway 20, Island Park, ID 83429 United States
Elevation: 1,962 ft
From West Yellowstone, Montana, take U.S. Highway 20 south for 22 mi, or from Ashton, Idaho, take U.S. Highway 20 north for 30 mi. The campground entrance is 1/4 mi south of Macks Inn on the west side of the highway.
The campground is accessible via U.S. Highway 20, which runs north and south with connections to West Yellowstone, Montana, and Ashton, Idaho.
The closest entrance is: West Entrance
Approximate drive: 20.2 mi · 35 min
Last updated: October 24, 2026
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Population: 170
Nearby city: Idaho Falls, ID
Approx. 78 mi away (straight-line distance)
Elevation: 6,289 ft
Island Park, ID
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