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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No available sites
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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
Donald B
September 18, 2025
Someone else was in our reserved spot. They let them stay the night in our spot without addressing the issue with them. They had returned by 7:30 pm. They had already left the next morning when we were leaving - leaving their tv behind again! Definitely felt entitled !!!!
RoseAnn M
VerifiedSeptember 17, 2025 • Stayed at: 322, Loop: 300s
Very small sites. The bathrooms were the dirtiest we've seen in 3 weeks of travel.
Pamela S
VerifiedSeptember 17, 2025 • Stayed at: 628, Loop: 600s
Great camping site for RVs.
Eugene R
VerifiedSeptember 17, 2025 • Stayed at: 708, Loop: 700s
Very clean campground. Our site was nice and level for our tent. Some of the campers were very loud and shined flashlights directly at our tent, but otherwise, a great experience.
Christine F
VerifiedSeptember 16, 2025 • Stayed at: 430, Loop: 400s
First time at this campgound. We choose it for its great location and amenities. Though a bit costly for the National Parks, I would probably stay again.
DeVeaux G
VerifiedSeptember 16, 2025 • Stayed at: 433, Loop: 400s
Headwaters is an excellent campground. Sites are short walk to restrooms and water. Restrooms were clean and plenty of hot water for showers. The staff person in the office was friendly, welcoming and helpful to find our site and answer any questions.
Definitely would recommend Headwaters campground!
Donna S
VerifiedSeptember 16, 2025 • Stayed at: 303, Loop: 300s
Staff was very accommodating getting us a last minute spot.
Cheryl H
VerifiedSeptember 15, 2025 • Stayed at: 423, Loop: 400s
Staff very helpful and amicable restrooms clean lovely campground and convenient
Phil M
VerifiedSeptember 15, 2025 • Stayed at: 302, Loop: 300s
Way too expensive for the amenities and proximity to the road.
Fred H
VerifiedSeptember 12, 2025 • Stayed at: 209, Loop: 200s
Our camper cabin was clean and the restrooms also.
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!