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Joseph P
VerifiedJune 12, 2026 Stayed at: B016, Loop: FLAT
Camp host was awful complained about dog barking during the middle of the day, but it was okay for her dog to bark
Helpful
Featured amenities
Parking
Restrooms
About Flat Rock (Idaho)
Flat Rock Campground is located 22 mi south of West Yellowstone, Montana and 30 mi north of Ashton, Idaho in beautiful Island Park, Idaho. Flat Rock is adjacent to U.S. Highway 20 and the Henry's Fork of the Snake River at an elevation of 6.4 ft.
Available sites
37 total sitesActivities & Attractions
Nearby
Fishing
Year-round
Hiking
Year-round
Year-round
Fishing
Nearby
Hiking
Nearby
Seasonal information
2026
(Current year)
2026 Season availability
Current season
Upcoming seasons
Past seasons
Closed periods
Jan
Feb
Mar
Apr
May
Jun
Jul
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Currently closed
Campground Amenities
Most popular amenities
Parking
Restrooms
Water and Hygiene
- Restrooms
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- Parking
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Rates, Sites & Availability
Select check-in and check-out dates to see real-time availability for each site.
37 Sites Available
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B005, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B006, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B007, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B008, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B009, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B010, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B011, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B012, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B013, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B014, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B015, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B016, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B017, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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XXX1, Loop: MANAGEMENT SITES
Tent
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XXX10, Loop: MANAGEMENT SITES
Tent
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XXX11, Loop: MANAGEMENT SITES
Tent
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XXX12, Loop: MANAGEMENT SITES
Tent
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XXX13, Loop: MANAGEMENT SITES
Tent
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XXX14, Loop: MANAGEMENT SITES
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XXX15, Loop: MANAGEMENT SITES
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XXX16, Loop: MANAGEMENT SITES
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XXX17, Loop: MANAGEMENT SITES
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XXX18, Loop: MANAGEMENT SITES
Tent
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XXX19, Loop: MANAGEMENT SITES
Tent
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XXX2, Loop: MANAGEMENT SITES
Tent
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XXX20, Loop: MANAGEMENT SITES
Tent
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XXX21, Loop: MANAGEMENT SITES
Tent
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XXX22, Loop: MANAGEMENT SITES
Tent
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XXX23, Loop: MANAGEMENT SITES
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XXX24, Loop: MANAGEMENT SITES
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XXX3, Loop: MANAGEMENT SITES
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XXX4, Loop: MANAGEMENT SITES
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XXX5, Loop: MANAGEMENT SITES
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XXX6, Loop: MANAGEMENT SITES
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XXX7, Loop: MANAGEMENT SITES
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XXX8, Loop: MANAGEMENT SITES
Tent
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XXX9, Loop: MANAGEMENT SITES
Tent
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Site Details
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37 Sites Available
Site
Price
🚐
B005, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
🚐
B006, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
🚐
B007, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B008, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B009, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
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B010, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B011, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B012, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B013, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B014, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B015, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B016, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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B017, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
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XXX1, Loop: MANAGEMENT SITES
Tent
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XXX10, Loop: MANAGEMENT SITES
Tent
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XXX11, Loop: MANAGEMENT SITES
Tent
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XXX12, Loop: MANAGEMENT SITES
Tent
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XXX13, Loop: MANAGEMENT SITES
Tent
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XXX14, Loop: MANAGEMENT SITES
Tent
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XXX15, Loop: MANAGEMENT SITES
Tent
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XXX16, Loop: MANAGEMENT SITES
Tent
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XXX17, Loop: MANAGEMENT SITES
Tent
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XXX18, Loop: MANAGEMENT SITES
Tent
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XXX19, Loop: MANAGEMENT SITES
Tent
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XXX2, Loop: MANAGEMENT SITES
Tent
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XXX20, Loop: MANAGEMENT SITES
Tent
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XXX21, Loop: MANAGEMENT SITES
Tent
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XXX22, Loop: MANAGEMENT SITES
Tent
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XXX23, Loop: MANAGEMENT SITES
Tent
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XXX24, Loop: MANAGEMENT SITES
Tent
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XXX3, Loop: MANAGEMENT SITES
Tent
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XXX4, Loop: MANAGEMENT SITES
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XXX5, Loop: MANAGEMENT SITES
Tent
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XXX6, Loop: MANAGEMENT SITES
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XXX7, Loop: MANAGEMENT SITES
Tent
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XXX8, Loop: MANAGEMENT SITES
Tent
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XXX9, Loop: MANAGEMENT SITES
Tent
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
188 reviews
Summary
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
Overall rating
Based on 188 reviews
5 stars
57.4% (108)
4 stars
25.0% (47)
3 stars
9.0% (17)
2 stars
3.7% (7)
1 star
4.8% (9)
Showing 188 reviews
Verified Only
Sort by: Oldest First
Reed C
VerifiedJune 22, 2026 Stayed at: B006, Loop: FLAT
Site was just right it fit our 30 ft trailer just fine. Our camp host Annie is the best. The only drawback is the noise from the highway and it really wasn’t that bad. Be aware there are some pretty good size potholes coming into the campground. Other than that exactly as we expected it was a beautiful Campground. Great neighbors and very close to Yellowstone and all the activities.
Helpful
ryan f
VerifiedJuly 3, 2026 Stayed at: B014, Loop: FLAT
this is a very loud camp ground, it is much to close to the road
Helpful
Cody R
VerifiedJuly 12, 2026 Stayed at: B008, Loop: FLAT
I like the stay. The park was clean and maintained. And would stay again. But the camp host was very disrespectful towards everyone that was trying to leave on time and harassed my family and I over trying to leave. And on getting there. Trying to find the camp was very stressful. Need more heads up and notice.
Helpful
Paul M
VerifiedJuly 18, 2026 Stayed at: B011, Loop: FLAT
Nice small campground. Could use a spruce up and some Site leveling. Great hosts very quiet area.
Helpful
carol F
VerifiedJuly 19, 2026 Stayed at: B010, Loop: FLAT
It was a very relaxing campground. It was cleaned. The trees were good and the camp post was very congenial.
Helpful
David S
VerifiedJuly 22, 2026 Stayed at: B009, Loop: FLAT
Central location. Dry camping. No dump site, water, but not at sites.
River is accessible walking through A loop, but private and no trespass within 200m on either side of flat Rock access.
Road noise due to highway within 50m.
Cell signal is weak, but usable (TMOBILE)
Helpful
Matthew C
VerifiedJuly 28, 2026 Stayed at: B007, Loop: FLAT
Site was a great place and the river access was just down the road.
Helpful
Georgia B
VerifiedJuly 28, 2026 Stayed at: B008, Loop: FLAT
Annie is amazing & keeps the campground clean & in order.
Helpful
Ken C
VerifiedAugust 1, 2026 Stayed at: B007, Loop: FLAT
Notice that ATVs are not allowed would have been nice. More and more pets are infringing on the serenity we used to expect, like the howling dog next to us.
Helpful
Location & Directions for Flat Rock (Idaho)
Highway 20, Island Park, ID 83429 United States
Elevation: 1,962 ft
Getting There
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.
Highway access
The campground is accessible via U.S. Highway 20, which runs north and south with connections to West Yellowstone, Montana, and Ashton, Idaho.
Near Yellowstone National Park
The closest entrance is: West Entrance
Approximate drive: 20.2 mi · 35 min
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
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Last updated: October 24, 2026
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Explore Island Park, ID
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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Managed by the USDA Forest Service