RV Sites
Tent Sites
Tracey S
VerifiedJune 1, 2026 Stayed at: B011, Loop: FLAT
Annie was a great Campground hostess. Involved, but not overwhelming
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
Aug
Sep
Oct
Nov
Dec
Currently closed
Campground Amenities
Most popular amenities
Parking
Restrooms
Water and Hygiene
- Restrooms
Parking and Transport
- Parking
Missing information?
Rates, Sites & Availability
Select check-in and check-out dates to see real-time availability for each site.
37 Sites Available
🚐
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
🚐
B008, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
🚐
B009, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
🚐
B010, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B011, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B012, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B013, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B014, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B015, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B016, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B017, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
⛺
XXX1, Loop: MANAGEMENT SITES
Tent
⛺
XXX10, Loop: MANAGEMENT SITES
Tent
⛺
XXX11, Loop: MANAGEMENT SITES
Tent
⛺
XXX12, Loop: MANAGEMENT SITES
Tent
⛺
XXX13, Loop: MANAGEMENT SITES
Tent
⛺
XXX14, Loop: MANAGEMENT SITES
Tent
⛺
XXX15, Loop: MANAGEMENT SITES
Tent
⛺
XXX16, Loop: MANAGEMENT SITES
Tent
⛺
XXX17, Loop: MANAGEMENT SITES
Tent
⛺
XXX18, Loop: MANAGEMENT SITES
Tent
⛺
XXX19, Loop: MANAGEMENT SITES
Tent
⛺
XXX2, Loop: MANAGEMENT SITES
Tent
⛺
XXX20, Loop: MANAGEMENT SITES
Tent
⛺
XXX21, Loop: MANAGEMENT SITES
Tent
⛺
XXX22, Loop: MANAGEMENT SITES
Tent
⛺
XXX23, Loop: MANAGEMENT SITES
Tent
⛺
XXX24, Loop: MANAGEMENT SITES
Tent
⛺
XXX3, Loop: MANAGEMENT SITES
Tent
⛺
XXX4, Loop: MANAGEMENT SITES
Tent
⛺
XXX5, Loop: MANAGEMENT SITES
Tent
⛺
XXX6, Loop: MANAGEMENT SITES
Tent
⛺
XXX7, Loop: MANAGEMENT SITES
Tent
⛺
XXX8, Loop: MANAGEMENT SITES
Tent
⛺
XXX9, Loop: MANAGEMENT SITES
Tent
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.
0 more sites below
Site Details
Select a site to view details
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
🚐
B008, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
🚐
B009, Loop: FLAT
RV
50 amp · Gravel · Driveway entry: Back-In
🚐
B010, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B011, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B012, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B013, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B014, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B015, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B016, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
🚐
B017, Loop: FLAT
RV
Gravel · Driveway entry: Back-In
⛺
XXX1, Loop: MANAGEMENT SITES
Tent
⛺
XXX10, Loop: MANAGEMENT SITES
Tent
⛺
XXX11, Loop: MANAGEMENT SITES
Tent
⛺
XXX12, Loop: MANAGEMENT SITES
Tent
⛺
XXX13, Loop: MANAGEMENT SITES
Tent
⛺
XXX14, Loop: MANAGEMENT SITES
Tent
⛺
XXX15, Loop: MANAGEMENT SITES
Tent
⛺
XXX16, Loop: MANAGEMENT SITES
Tent
⛺
XXX17, Loop: MANAGEMENT SITES
Tent
⛺
XXX18, Loop: MANAGEMENT SITES
Tent
⛺
XXX19, Loop: MANAGEMENT SITES
Tent
⛺
XXX2, Loop: MANAGEMENT SITES
Tent
⛺
XXX20, Loop: MANAGEMENT SITES
Tent
⛺
XXX21, Loop: MANAGEMENT SITES
Tent
⛺
XXX22, Loop: MANAGEMENT SITES
Tent
⛺
XXX23, Loop: MANAGEMENT SITES
Tent
⛺
XXX24, Loop: MANAGEMENT SITES
Tent
⛺
XXX3, Loop: MANAGEMENT SITES
Tent
⛺
XXX4, Loop: MANAGEMENT SITES
Tent
⛺
XXX5, Loop: MANAGEMENT SITES
Tent
⛺
XXX6, Loop: MANAGEMENT SITES
Tent
⛺
XXX7, Loop: MANAGEMENT SITES
Tent
⛺
XXX8, Loop: MANAGEMENT SITES
Tent
⛺
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: Newest First
David G
VerifiedNovember 19, 2025 Stayed at: B016, Loop: FLAT
Centrally located in Island Park. Good place for a couple nights stay. Watch out for those overhead branches. Make sure if you are in Loop B and coming from West Yellowstone you take the 2nd entrance, not the one down by the bridge.
Helpful
David G
VerifiedNovember 19, 2025 Stayed at: B016, Loop: FLAT
Centrally located in Island Park. Good place for a couple nights stay. Watch out for those overhead branches. Make sure if you are in Loop B and coming from West Yellowstone you take the 2nd entrance, not the one down by the bridge.
Helpful
Lisa K
VerifiedNovember 16, 2025 Stayed at: B013, Loop: FLAT
So nice and quiet! Loved the cows!
Helpful
Lisa K
VerifiedNovember 16, 2025 Stayed at: B013, Loop: FLAT
So nice and quiet! Loved the cows!
Helpful
Austin J
VerifiedSeptember 14, 2025 Stayed at: B015, Loop: FLAT
Clean campground I’ve been to many times and usually enjoy. The host this year was just rude multiple times and ruined the entire experience. Will probably not be back.
Helpful
Austin J
VerifiedSeptember 14, 2025 Stayed at: B015, Loop: FLAT
Clean campground I’ve been to many times and usually enjoy. The host this year was just rude multiple times and ruined the entire experience. Will probably not be back.
Helpful
Michael L
VerifiedSeptember 13, 2025 Stayed at: B005, Loop: FLAT
Great campground host.
Helpful
Michael L
VerifiedSeptember 13, 2025 Stayed at: B005, Loop: FLAT
Great campground host.
Helpful
Kelli O
VerifiedSeptember 10, 2025 Stayed at: B016, Loop: FLAT
Stinky bathrooms, bad but other than that, a nice place to stay.
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
Nearby destinations
Last updated: October 24, 2026
Need help?
Our team is here to help you find the perfect spot for your next adventure.
Message us
Replies within minutes
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
Weather & Conditions
Loading destination weather
From our Travel Guides
Managed by the USDA Forest Service