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Sherri Y
VerifiedDecember 23, 2019 Stayed at: B007, Loop: FLAT
Convenient location next to highway 20. Great camp hosts. Super friendly.
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
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Past seasons
Closed periods
Jan
Feb
Mar
Apr
May
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Jul
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Campground Amenities
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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
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
Tent
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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
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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
🚐
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
Tent
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XXX5, Loop: MANAGEMENT SITES
Tent
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XXX6, Loop: MANAGEMENT SITES
Tent
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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
Sherri Y
VerifiedDecember 23, 2019 Stayed at: B007, Loop: FLAT
Convenient location next to highway 20. Great camp hosts. Super friendly.
Helpful
Geri K
VerifiedJanuary 11, 2020 Stayed at: B016, Loop: FLAT
Great campground with easy access to area lakes and rivers. Walking distance to the river. Clean with lots of room for trailers or tents. Loved it! Will return.
Helpful
Geri K
VerifiedJanuary 11, 2020 Stayed at: B016, Loop: FLAT
Great campground with easy access to area lakes and rivers. Walking distance to the river. Clean with lots of room for trailers or tents. Loved it! Will return.
Helpful
Dalton C
VerifiedJanuary 15, 2020 Stayed at: B015, Loop: FLAT
The camp hosts were friendly and the facilities were clean. Though near the highway, it was quiet and peaceful. The campsite was cleaned and raked before we arrived.
Helpful
Jack A
VerifiedJanuary 15, 2020 Stayed at: B008, Loop: FLAT
The camp ground is a five star rating; however, it is located next to (100 ft) the main highway between West Yellowstone, MT and Ashton, Idaho. You hear all the traffic noise...all the time. There is a small highway grade passing the campground and the semi-trucks are giving the diesel pedal all they have. Upper Coffee Pot campground is 1 1/2 mi away and is better IF YOU CAN GET RESERVATIONS six months in advance! I mean SIX MONTHS to the day because people starting calling as soon as reservations open. If you don't mind the road noise, Flat Rock is a great place to stay and close enough to Yellowstone Park without taking your banker with you on your trip...20 minute drive to Yellowstone. Cheaper than West Yellowstone and Yellowstone National Park.
Helpful
Dalton C
VerifiedJanuary 15, 2020 Stayed at: B015, Loop: FLAT
The camp hosts were friendly and the facilities were clean. Though near the highway, it was quiet and peaceful. The campsite was cleaned and raked before we arrived.
Helpful
Jack A
VerifiedJanuary 15, 2020 Stayed at: B008, Loop: FLAT
The camp ground is a five star rating; however, it is located next to (100 ft) the main highway between West Yellowstone, MT and Ashton, Idaho. You hear all the traffic noise...all the time. There is a small highway grade passing the campground and the semi-trucks are giving the diesel pedal all they have. Upper Coffee Pot campground is 1 1/2 mi away and is better IF YOU CAN GET RESERVATIONS six months in advance! I mean SIX MONTHS to the day because people starting calling as soon as reservations open. If you don't mind the road noise, Flat Rock is a great place to stay and close enough to Yellowstone Park without taking your banker with you on your trip...20 minute drive to Yellowstone. Cheaper than West Yellowstone and Yellowstone National Park.
Helpful
Frank H
VerifiedJanuary 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
Lee H
VerifiedJanuary 16, 2020 Stayed at: B011, Loop: FLAT
nice clean place to camp
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.
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Last updated: October 24, 2026
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Managed by the USDA Forest Service