Featured amenities
Parking
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About Flat Rock (Idaho)
Number of accommodations: 37
Nearby Activities & Attractions
Fishing
Hiking
Seasonal information
2026 Season availability
Campground Amenities
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Parking
Restrooms
Water and Hygiene
- Restrooms
Parking and Transport
- Parking
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Rates, Sites & Availability
37 Sites Available
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37 Sites Available
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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
Kelli O
VerifiedSeptember 10, 2025 • Stayed at: B016, Loop: FLAT
Stinky bathrooms, bad but other than that, a nice place to stay.
Brent B
VerifiedSeptember 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.
Randy S
VerifiedSeptember 9, 2025 • Stayed at: B007, Loop: FLAT
The host did an excellent job of taking care of the campground and all the campers
Randy S
VerifiedSeptember 9, 2025 • Stayed at: B007, Loop: FLAT
The host did an excellent job of taking care of the campground and all the campers
Joseph M
VerifiedAugust 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.
Joseph M
VerifiedAugust 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.
Daniel D
VerifiedAugust 25, 2025 • Stayed at: B011, Loop: FLAT
Camp host very welcoming and talkative. Camp is kept neat and organized
Daniel D
VerifiedAugust 25, 2025 • Stayed at: B011, Loop: FLAT
Camp host very welcoming and talkative. Camp is kept neat and organized
Carter M
VerifiedAugust 17, 2025 • Stayed at: B013, Loop: FLAT
Great place, large sites
Carter M
VerifiedAugust 17, 2025 • Stayed at: B013, Loop: FLAT
Great place, large sites
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
