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
Report Incorrect Information
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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
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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
Jeremy W
VerifiedOctober 7, 2025 • Stayed at: 413, Loop: 400s
Quiet, flat and clean. Spaces are little closer together but for Rv, vans, cab overs it’s no biggie. Sites are all level or near level. Clean bathrooms, and clean showers included in site fees.
Roger W
VerifiedOctober 7, 2025 • Stayed at: 424, Loop: 400s
Friendly staff. Convenient location to see both parks.
Jennifer P
VerifiedOctober 7, 2025 • Stayed at: 303, Loop: 300s
We had a great site, saw some beautiful stars at night.
Kelli C
VerifiedOctober 7, 2025 • Stayed at: 328, Loop: 300s
Great location if you are visiting both Yellowstone and Grand Teton. Spots were close together however still nice. Only complaint was the barking dogs. It was hard to enjoy peaceful fires at night with barking dogs in the campers around us and outside at people's campsites.
Kelly G
VerifiedOctober 7, 2025 • Stayed at: 108, Loop: 100s
Really enjoyed my stay it was convenient and staff was very helpful
Sheng-Yean C
VerifiedOctober 7, 2025 • Stayed at: 706, Loop: 700s
Easy to locate. Easy check in and out. Clean bathroom and shower. Portable water available. Free WiFi available by bathroom, check in area and the lobby of the lodge nearby. The campground is at a perfect location to visit both YellowStone and Grand Teton National Parks if one cannot find suitable campsite inside either parks. We stay at a tent site. It is flat, easy to set up a tent. At the RV site, there are electric hook up that can accommodate level 2 EV charger. A big plus for EV owner.
Karl M
VerifiedOctober 5, 2025 • Stayed at: 623, Loop: 600s
Loved the location, perfect for exploring and enjoying both Yellowstone National Park and Teton National Park, the campsite was more than adequate and the facilities were clean and well maintained. I would recommend it for anyone planning on seeing both parks.
Angel C
VerifiedOctober 5, 2025 • Stayed at: 208, Loop: 200s
⭐⭐⭐⭐⭐ 5/5 — Perfect stay at Headwaters at Flagg Ranch!
We had such a wonderful time staying at Headwaters at Flagg Ranch! The location was absolutely perfect—right between Grand Teton and Yellowstone, which made exploring both parks super convenient. The mountains were stunning, the air was crisp, and we even spotted some wildlife nearby!
The campground was peaceful and quiet, with clean bathrooms and well-kept facilities. It really felt like the perfect balance of comfort and nature. This is our 3rd year here and we’ll definitely be coming back!
Lauranne S
VerifiedOctober 5, 2025 • Stayed at: 524, Loop: 500s
Perfect location for Grand Teton/Yellowstone base camp. Quiet during quiet times.
Claire A
October 5, 2025
The overall setting and staff are 5 stars. I’ve stayed here multiple times, and would definitely stay again.
I gave it three stars for a few reasons I see as places for easy improvements.
1 - we stayed in cabin 101 not realizing it faces the dumpsters, check-in area and main flow of all incoming traffic, which over a weekend is constant. That all devalues it. People staying there do not get the same peace and value as those in other cabins and it should be a discounted price during weekends and peak times.
Additionally, since there was no apparent campground host, guess where everyone arriving late goes? That’s right! Cabin 101!!! We were interrupted 4 separate times in one evening by people needing my to know basic campground wayfinding because signage is so minimal and there are no hosts up front in that spot.
Lastly, the hooks in Cabin 101 and in the closest bathroom all appeared to be ripped off. I hate that guests can’t keep things nice! But having those makes a big difference in functionality.
Place a host prominently up front by check in. Place user-friendly signage. Fix simple things like hooks in cabins and bathrooms. Give guests in 101 a slight discount since that stay is definitely not the same value as others.
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 13, 2026
