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Jeffrey F
VerifiedAugust 23, 2021 Stayed at: B008, Loop: FLAT
Very clean. Camp host was friendly and attentive. Highly recommend.
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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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
Tent
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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
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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
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
bryan p
VerifiedSeptember 5, 2021 Stayed at: B010, Loop: FLAT
Nice wide level campsite. Access road is dirt, so some dust. Also some traffic noise from the highway. Good host. The loops are not well marked and should be.
Helpful
bryan p
VerifiedSeptember 5, 2021 Stayed at: B010, Loop: FLAT
Nice wide level campsite. Access road is dirt, so some dust. Also some traffic noise from the highway. Good host. The loops are not well marked and should be.
Helpful
Kevin T
VerifiedSeptember 7, 2021 Stayed at: B013, Loop: FLAT
We were very impressed with the neatness and tidiness of the whole campground. bathrooms very clean, we will definitely return.
Helpful
Kevin T
VerifiedSeptember 7, 2021 Stayed at: B013, Loop: FLAT
We were very impressed with the neatness and tidiness of the whole campground. bathrooms very clean, we will definitely return.
Helpful
Glenn H
VerifiedSeptember 18, 2021 Stayed at: B010, Loop: FLAT
We had an awful time finding it, put an address on the website compatable with a GPS! Had we not called, worried about the wildfires we would have headed to the Stanley address. Even then no one had an address, just directions "across from Mack's in Island Park"?
Helpful
Glenn H
VerifiedSeptember 18, 2021 Stayed at: B010, Loop: FLAT
We had an awful time finding it, put an address on the website compatable with a GPS! Had we not called, worried about the wildfires we would have headed to the Stanley address. Even then no one had an address, just directions "across from Mack's in Island Park"?
Helpful
Beth B
VerifiedSeptember 26, 2021 Stayed at: B014, Loop: FLAT
Nice, quiet, small campground. Sites were large, level and extremely clean, well maintained. Park hosts were very friendly and helpful--gave me great local information. Site B14
Helpful
Beth B
VerifiedSeptember 26, 2021 Stayed at: B014, Loop: FLAT
Nice, quiet, small campground. Sites were large, level and extremely clean, well maintained. Park hosts were very friendly and helpful--gave me great local information. Site B14
Helpful
Tara G
VerifiedOctober 4, 2021 Stayed at: B008, Loop: FLAT
Super nice spot. Great camp host. Will definitely visit again
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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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