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
Campground Amenities
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General Store
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Pet Friendly
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Potable Water
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Restaurant
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Showers
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Propane
Seasonal information
2026 Season availability
Sites & Availability
165 Sites Available
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Site Details
Select a site to view details
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 (554)
What Guests Are Saying
Headwaters Campground at Flagg Ranch is highly praised for its excellent location between Yellowstone and Grand Teton, making it a convenient base for exploring both parks. Reviewers appreciate the clean facilities, friendly staff, and well-maintained grounds, along with amenities like hot showers and a grocery store on-site. While some noted noise levels and tight campsite spacing, many expressed satisfaction with their overall experiences and indicated they would return.
What Guests Are Saying
Headwaters Campground at Flagg Ranch is highly praised for its excellent location between Yellowstone and Grand Teton, making it a convenient base for exploring both parks. Reviewers appreciate the clean facilities, friendly staff, and well-maintained grounds, along with amenities like hot showers and a grocery store on-site. While some noted noise levels and tight campsite spacing, many expressed satisfaction with their overall experiences and indicated they would return.
Review Summary
Mark W
VerifiedAugust 29, 2025 • Stayed at: 426, Loop: 400s
Bad sewer connection points and each site's connection was different. Camp sites are too close together and some "RV sites" are too small for most RVs. Staff are mainly college kids and most are not helpful or knowledgeable.
Lori M
VerifiedAugust 28, 2025 • Stayed at: 311, Loop: 300s
Flagg Ranch campground was a great spot for us to explore Teton National Park AND Yellowstone National Park. The campground was clean, well managed and quiet at night. Camp sites were easy to negotiate with large RV’s and there was a reasonable amount of space between and around each site.
Kim V
VerifiedAugust 27, 2025 • Stayed at: 317, Loop: 300s
Very nice campground but quite remote from other areas in the Teton Park
Andrea L
VerifiedAugust 26, 2025 • Stayed at: 209, Loop: 200s
It was so lovely to have a lockable door and shelter while still on a campground! Our site was great, which amazing sunset light. The cabin was simple (a table, two chairs, and a bunk bed, foam pad type mattresses), but it was more than enough. We thought this area was a great in-between to spend days at both Yellowstone and Grand Teton.
jennifer h
VerifiedAugust 25, 2025 • Stayed at: 326, Loop: 300s
We stayed for 4 days. Our site was full hook ups and not far from the entrance. We loved that it was very close to the Yellowstone entrance. A store, gas station, restaurant and gift shop was within walking distance. Other than the dust on really windy days because it had been so dry it was a really great stay. I would highly recommend staying here.
Mohammad A
VerifiedAugust 22, 2025 • Stayed at: 531, Loop: 500s
Great. Has all the resources you need within walking distance. Quiet, great mobile signals,
Duane A
VerifiedAugust 21, 2025 • Stayed at: 517, Loop: 500s
Very nice campsites. Mostly shaded. Great store and restaurant on premises. Also trails right from the campground. There is a gas station with free air just across the road.
Judith H
VerifiedAugust 20, 2025 • Stayed at: 518, Loop: 500s
The overall experience was pleasant. The only issue with the site was that we were so close to other, and I couldn't get my rig close enough to the sewer without snuggling up to a tree. However, if I had another section of hose, it wouldn't be an issue. I did talk with another camper who said it was positioned too high for them. The amenities were all great, and we loved the access to all the destinations we wanted.
Sujoy D
VerifiedAugust 20, 2025 • Stayed at: 109, Loop: 100s
The non-electric cabins are spacious enough inside to easily accommodate a family of 4 people. Each cabin has a fire pit, a dining table and a vehicle parking space.
Regina S
VerifiedAugust 19, 2025 • Stayed at: 326, Loop: 300s
Headwaters was the perfect spot for exploring both Yellowstone and the Grand Tetons. The RV park had larger spacing so we had room for outside living plus our 40 ft trailer. Camp hosts were helpful. The lodge was close so we could walk over for anything we needed from the little store there.
Going to see moose in the early morning was a bit of a drive to Jenny Lake/Moose Pond area but was under an hour. Old Faithful was also only about an hour.
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.
Latitude & Longitude: 44.1068 / -110.666
Elevation: 2088 feet
Policies & Rules
| Category | About |
|---|---|
| General |
The maximum stay permitted at the Flagg Ranch Campground is 14 nights, and the maximum cumulative stay between all park campgrounds is 30 nights. Changing Reservations: • If a visitor wants to switch dates that are entirely outside of the original reservation dates, there is a $10 change fee.
Deposits:
Cancellations:
Late Cancellations or Cancellations within the Cut-off Window:
No-Shows:
Early Departures:
Refunds:
Emergency Closures:
|
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!