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
kelly g
VerifiedJuly 13, 2025 • Stayed at: 703, Loop: 700s
Nicely maintained campground. The check in host was very helpful & seemed to care about her work.
Whitney R
VerifiedJuly 13, 2025 • Stayed at: 612, Loop: 600s
Campground was large and very beautiful. Enjoyed it greatly. Would plan on returning. Bathrooms were very clean and nice. Loved being close to the river. We saw lots of animals around the campground.
Tanner R
VerifiedJuly 12, 2025 • Stayed at: 520, Loop: 500s
Bathrooms and Showers were always clean and ready to use. Only complaint is that the site we had was too small for our tent and the sites were really close together.
Kenneth D
VerifiedJuly 12, 2025 • Stayed at: 102, Loop: 100s
Cabins are clean. Restrooms/showers are clean. They have gas pumps, small convenience store, and a restaurant. Very good, close access to Yellowstone and Grand Tetons National Parks.
Gretchen C
VerifiedJuly 12, 2025 • Stayed at: 615, Loop: 600s
Clean, comfortable, great views
Sarah K
VerifiedJuly 12, 2025 • Stayed at: 324, Loop: 300s
We had a wonderful time at Headwaters campground! The campground was full, but didn’t feel chaotic or over busy at all. Bathrooms were clean, staff was helpful at check in, campground was quiet. We moved our campgrounds to Headwaters after we weren’t able to get an RV spot at Colter Bay, and we were happy it worked out that way once we were in the park! Perfect location between the Grand Tetons and Yellowstone!
Amy V
VerifiedJuly 11, 2025 • Stayed at: 513, Loop: 500s
Quiet, clean, close to the river. They had fun presentations for all ages at the amphitheatre every night. Across the street is a nice store. Our only complaint was it was very dusty. Could use some rock/gravel to limit the dust from vehicles..
Michael W
VerifiedJuly 11, 2025 • Stayed at: 110, Loop: 100s
This campground is a fantastic gateway for exploring the breathtaking wonders of Yellowstone and Grand Teton National Parks! Whether you're seeking adventure or serenity, it's the perfect spot to immerse yourself in nature's beauty.
Elizabeth J
VerifiedJuly 9, 2025 • Stayed at: 601, Loop: 600s
Perfect little cabin for the three of us. Got a very good night's rest and the showers were clean!
Nathalie M
VerifiedJuly 9, 2025 • Stayed at: 403, Loop: 400s
We were very disappointed in the condition of the park. The RV spots were very very dusty, the grass was overgrown and not mowed. On a positive note the staff person at checkin was excellent and very welcoming.
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!