Featured amenities
Parking
Restrooms
About Flat Rock (Idaho)
Number of accommodations: 37
Nearby Activities & Attractions
Fishing
Hiking
Seasonal information
2026 Season availability
Campground Amenities
Most popular amenities
Parking
Restrooms
Water and Hygiene
- Restrooms
Parking and Transport
- Parking
Report Incorrect Information
Help us improve by reporting any incorrect amenity information for Flat Rock (Idaho).
Rates, Sites & Availability
37 Sites Available
No sites found matching your criteria.
No available sites
All sites are booked for your selected dates. Try showing all sites to see booked options, create an alert to be notified when something opens up, or adjust your dates.
Site Details
Select a site to view details
37 Sites Available
No available sites
All sites are booked for your selected dates. Try showing all sites to see booked options, create an alert to be notified when something opens up, or adjust your dates.
Reviews (154)
What Guests Are Saying
Flat Rock in Island Park offers a great location with clean facilities and spacious, shaded campsites, making it ideal for a short stay. Many visitors appreciate the welcoming and attentive campground host, who maintains a neat environment and fosters a pleasant atmosphere. However, some guests have reported issues with rude interactions with the host and road noise from the nearby highway, which detracts from the experience.
What Guests Are Saying
Flat Rock in Island Park offers a great location with clean facilities and spacious, shaded campsites, making it ideal for a short stay. Many visitors appreciate the welcoming and attentive campground host, who maintains a neat environment and fosters a pleasant atmosphere. However, some guests have reported issues with rude interactions with the host and road noise from the nearby highway, which detracts from the experience.
Review Summary
Elmer F
VerifiedAugust 15, 2021 • Stayed at: B014, Loop: FLAT
Awesome campground , close to all recreational activities.
Elmer F
VerifiedAugust 15, 2021 • Stayed at: B014, Loop: FLAT
Awesome campground , close to all recreational activities.
Marty W
VerifiedJuly 28, 2021 • Stayed at: B007, Loop: FLAT
Nice clean campground no showers and no water at each campsite
Marty W
VerifiedJuly 28, 2021 • Stayed at: B007, Loop: FLAT
Nice clean campground no showers and no water at each campsite
Sarah S
VerifiedJuly 25, 2021 • Stayed at: B017, Loop: FLAT
it's very close to the road. I wanted that originally because It's right across the street from Mack's Inn and I was going to float Big Spring with them. But the campground is SO loud. Also, if you're going in the 2021 summer season the camp host is kind of annoying. I knew there were fire restrictions in place because I researched and called the visitor center- they are allowed in developed campgrounds and inside the designated fire ring. He told us that it could not be above the fire ring, I had a single log burning and he stopped to tell me it was too high. I think he should probably shovel his pit more if a single log is too high for him? It just seemed like he made this regulation up and he wouldn't leave us alone. I was visited by him every evening at dinner time and other times aside from that. I just wanted to be left alone while I was camping. He did keep everything clean but I'd rather a dirty pit toilet if it means I can camp in peace.
Sarah S
VerifiedJuly 25, 2021 • Stayed at: B017, Loop: FLAT
it's very close to the road. I wanted that originally because It's right across the street from Mack's Inn and I was going to float Big Spring with them. But the campground is SO loud. Also, if you're going in the 2021 summer season the camp host is kind of annoying. I knew there were fire restrictions in place because I researched and called the visitor center- they are allowed in developed campgrounds and inside the designated fire ring. He told us that it could not be above the fire ring, I had a single log burning and he stopped to tell me it was too high. I think he should probably shovel his pit more if a single log is too high for him? It just seemed like he made this regulation up and he wouldn't leave us alone. I was visited by him every evening at dinner time and other times aside from that. I just wanted to be left alone while I was camping. He did keep everything clean but I'd rather a dirty pit toilet if it means I can camp in peace.
Bonnie K
VerifiedJuly 8, 2021 • Stayed at: B005, Loop: FLAT
Camp hosts are very friendly and are working very hard to keep campsites clean and restrooms clean. Love this campsite and appreciate what they do.
Bonnie K
VerifiedJuly 8, 2021 • Stayed at: B005, Loop: FLAT
Camp hosts are very friendly and are working very hard to keep campsites clean and restrooms clean. Love this campsite and appreciate what they do.
Ryan B
VerifiedJune 27, 2021 • Stayed at: B005, Loop: FLAT
Campsite was nice and well spaced apart from adjacent campsites. Unfortunately, the road noise was quite loud and disappointing. The camp host was very grumpy and not helpful at all.
Ryan B
VerifiedJune 27, 2021 • Stayed at: B005, Loop: FLAT
Campsite was nice and well spaced apart from adjacent campsites. Unfortunately, the road noise was quite loud and disappointing. The camp host was very grumpy and not helpful at all.
Location Flat Rock (Idaho)
Address:
Highway 20
Island Park, ID, 83429
United States
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.
The campground is accessible via U.S. Highway 20, which runs north and south with connections to West Yellowstone, Montana, and Ashton, Idaho.
Latitude & Longitude: 44.4969 / -111.34
Elevation: 1962 feet
Policies & Rules
General
- Wildlife Caution
- Idaho OHV Safety Message
- A $7 fee for extra vehicles will be collected at the campground
- No ATVs/OHVs allowed in the campground
- This campground has first come, first served sites
- Click here for more information on the Caribou-Targhee National Forest
- Don't Move Firewood: Help prevent the spread of tree-killing pests in our national forests by obtaining firewood near your destination and burning it on-site. For more information visit dontmovefirewood.org.
Nearby Campgrounds
Nearby destinations
Last updated: June 4, 2026
