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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
January 16, 2020 Stayed at: B015, Loop: FLAT
We love Island Park, and we love Flat Rock campground. Level, clean sites. Easy access to water. Clean bathrooms, friendly camp hosts. Close to Big Spring and river floating access.
Helpful
January 16, 2020 Stayed at: B011, Loop: FLAT
nice clean place to camp
Helpful
January 17, 2020 Stayed at: B017, Loop: FLAT
Nice campground. Some road noise. Camp hostess was anything but welcoming.
Helpful
January 17, 2020 Stayed at: B017, Loop: FLAT
Nice campground. Some road noise. Camp hostess was anything but welcoming.
Helpful
July 26, 2020 Stayed at: B006, Loop: FLAT
I have camped in that area for many years. This was the worst campground hostess we have ever had. She not once said hello to me or my family. When we arrived there was no one in the campground host campsite. After we parked our trailer, we discovered smoke and a smoldering campfire and trash in the pit in our site. There was trash in the site and the campground. The campground had obviously not been cared for. We were there almost a week and never did we see the campground host care for any site or the campground itself. We went to throw our trash away and the host was walking her dogs. We found the trash was full so my wife asked when they would be emptied, and she never did answer.
Helpful
July 26, 2020 Stayed at: B006, Loop: FLAT
I have camped in that area for many years. This was the worst campground hostess we have ever had. She not once said hello to me or my family. When we arrived there was no one in the campground host campsite. After we parked our trailer, we discovered smoke and a smoldering campfire and trash in the pit in our site. There was trash in the site and the campground. The campground had obviously not been cared for. We were there almost a week and never did we see the campground host care for any site or the campground itself. We went to throw our trash away and the host was walking her dogs. We found the trash was full so my wife asked when they would be emptied, and she never did answer.
Helpful
July 30, 2020 Stayed at: B016, Loop: FLAT
Restrooms clean, camp site spacious, lots of shade at most sites. Be prepared for street noise since it is just off of the highway.
Helpful
July 30, 2020 Stayed at: B016, Loop: FLAT
Restrooms clean, camp site spacious, lots of shade at most sites. Be prepared for street noise since it is just off of the highway.
Helpful
August 1, 2020 Stayed at: B006, Loop: FLAT
Site was very clean and quiet.
Helpful
August 1, 2020 Stayed at: B006, Loop: FLAT
Site was very clean and quiet.
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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