Warning
GeneralSummer Update: Enhancing our campground for youOur campground is getting an upgrade! A significant, multi-year construction project to enhance utility infrastructure will be occurring within the campground this summer. To minimize disruption to the campground experience, noise creating construction activities will be limited to 9am to 6pm. Please note that our laundry facilities will also have reduced availability during this project. We appreciate your patience as we improve your experience for seasons to come and cannot wait to welcome you this summer!
About Headwaters Campground at Flagg Ranch
Number of accommodations: 165
Seasonal information
2026 Season availability
Campground Amenities
Most popular amenities
General Store
Pet friendly
Showers
Water and Hygiene
- Potable Water
- Showers
On Site Services
- General Store
- Restaurant
- Propane
Pets and Policies
- Pet friendly
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Rates, Sites & Availability
165 Sites Available
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Site Details
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165 Sites Available
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 (2212)
What Guests Are Saying
Headwaters Campground at Flagg Ranch is praised for its beautiful location between Yellowstone and the Grand Tetons, with clean facilities and friendly staff. Guests appreciate the tidy grounds, hot showers, and convenient access to nearby attractions. While some noted tight spaces and occasional issues with hot water in the women's showers, the overall experience is very positive, with many expressing a desire to return.
What Guests Are Saying
Headwaters Campground at Flagg Ranch is praised for its beautiful location between Yellowstone and the Grand Tetons, with clean facilities and friendly staff. Guests appreciate the tidy grounds, hot showers, and convenient access to nearby attractions. While some noted tight spaces and occasional issues with hot water in the women's showers, the overall experience is very positive, with many expressing a desire to return.
Review Summary
Tom S
VerifiedOctober 2, 2023 • Stayed at: 428, Loop: 400s
They put us at a site with 5" of standing water on the entire site. It was very expensive for what you get. Campground was poorly managed. Front desk customer service was not helpful nor understanding. Although it was raining upon our arrival, after 8 hours of no rain, there was still standing water at the site. We felt there should have been a partial refund, we know they can't control the weather, but the site conditions were horrible.
Libby F
VerifiedOctober 2, 2023 • Stayed at: 430, Loop: 400s
Roomy campsites, clean bathrooms. A few sink/shower drains were clogged so not sure how often they are services. Friendly staff. The nearby restaurant had excellent food, although pricey. But if you want to treat yourself while you rough it, that's the place to go. Good proximity to south Yellowstone and Grand Tetons. Will definitely stay there again.
Rebecca S
VerifiedOctober 1, 2023 • Stayed at: 519, Loop: 500s
I made our reservations 5 mos in advance and still had to move 3 sites to get 8 days, reserve early! We are 45' with 4 slides, we fit in all the sites that we had, but even tho they were rated as pull thrus, I had to back out of 2 sites, it was evident by the scrapping on the trees that I was not going to be able to pull out.
All in all was a good experience, centrally located, not cheap but as I've been told
" this is expensive country"
Steve J
VerifiedOctober 1, 2023 • Stayed at: 525, Loop: 500s
Way too much money >$100 for a sub par camping experience. They have a captive audience and take advantage.
Karyn S
VerifiedOctober 1, 2023 • Stayed at: 213, Loop: 200s
Property was easy to find, and as advertised. Campground was quiet, clean and neat. Cabin was basic but comfortable. Facilities were McLean and well lit.
David H
VerifiedOctober 1, 2023 • Stayed at: 412, Loop: 400s
Excellent staff very friendly
Rebecca S
VerifiedOctober 1, 2023 • Stayed at: 519, Loop: 500s
I made our reservations 5 mos in advance and still had to move 3 sites to get 8 days, reserve early! We are 45' with 4 slides, we fit in all the sites that we had, but even tho they were rated as pull thrus, I had to back out of 2 sites, it was evident by the scrapping on the trees that I was not going to be able to pull out.
All in all was a good experience, centrally located, not cheap but as I've been told
" this is expensive country"
Steve J
VerifiedOctober 1, 2023 • Stayed at: 525, Loop: 500s
Way too much money >$100 for a sub par camping experience. They have a captive audience and take advantage.
Karyn S
VerifiedOctober 1, 2023 • Stayed at: 213, Loop: 200s
Property was easy to find, and as advertised. Campground was quiet, clean and neat. Cabin was basic but comfortable. Facilities were McLean and well lit.
David H
VerifiedOctober 1, 2023 • Stayed at: 412, Loop: 400s
Excellent staff very friendly
Location Headwaters Campground at Flagg Ranch
Address:
1 Grassy Lake Road
Moran, WY, 83013
United States
The address for Headwaters at Flagg Ranch is located below; however, due to this property's remote location, GPS cannot always be relied on.
100 Grassy Lake Rd.
Moran, WY 83013
(Two miles south of the south gate of Yellowstone)
From Yellowstone:
Follow the signage to the South gate of Yellowstone - about 40 miles from Old Faithful.
After exiting the south gate, Headwaters at Flagg Ranch will be just 2 miles South on the right side of the road.
From Jackson, WY:
Head North from Jackson on US 191/89.
Turn left to continue on US 191/89 at the Moran Junction and enter the Grand Teton National Park through the Moran entrance.
Continue straight through the Jackson Lake junction for another 21 miles.
Headwaters at Flagg Ranch will be located on the left side of the road.
As you pull into the property, the lodge will be located on your right and the campground will be on the left.
Please note Grassy Lake Road is a dirt and gravel road that leads to Ashton, Idaho. Four-wheel drive is strongly encouraged on this narrow single-lane road. It is not recommended for trailer traffic or large vehicles.
Headwaters Campground at Flagg Ranch is accessible via US 191/89, which connects to the Moran Junction. The campground is located approximately 2 miles south of the south gate of Yellowstone National Park.
Latitude & Longitude: 44.1068 / -110.666
Elevation: 2088 feet
Policies & Rules
Arrival & departure
Check out time
11AM
Cancellation policy
- Reservation fees are non-refundable. For campsites, cabins, lookouts, yurts, group sites, and similar stays, we charge a reservation service fee of $8.
- Standard cancellations usually have a $10 cancellation fee. Customers can generally cancel before the check-in date online.
- Late cancellation rules differ by stay type.
- Individual campsites: cancelling after 12:00am local time the day before arrival usually means a $10 cancellation fee plus forfeiting the first night's fee.
- Cabins, lookouts, and yurts: cancelling less than 14 days before arrival usually means a $10 cancellation fee plus forfeiting the first night's fee.
- One-night reservations: a late cancellation usually forfeits the full amount paid, up to the total original reservation cost.
- Modifications are allowed before the cut-off window, but fees depend on the change. Changing to dates completely outside the original reservation dates may trigger a $10 change fee. Extending or shortening a stay that still includes original dates usually has no change fee, though refunds may depend on timing and facility rules. Switching to the same type of campsite for the same dates usually has no change fee, but price differences are charged or refunded.
- Early departures may or may not be refunded. At certain facilities, partial refunds may be possible if staff can mark the site available for other visitors. No refund is given for a night if the early departure is requested after that day's check-out time.
- Security deposits are separate. Security deposits may be refunded to the original payment method if the facility is left in acceptable condition, as determined by the property.
Cancellation policy
- Emergency closures will result in a full refund and notifications sent to the visitor.
Warnings & Advisories
Warning
GeneralSummer Update: Enhancing our campground for youOur campground is getting an upgrade! A significant, multi-year construction project to enhance utility infrastructure will be occurring within the campground this summer. To minimize disruption to the campground experience, noise creating construction activities will be limited to 9am to 6pm. Please note that our laundry facilities will also have reduced availability during this project. We appreciate your patience as we improve your experience for seasons to come and cannot wait to welcome you this summer!
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Last updated: June 16, 2026
