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
lynne f
VerifiedJuly 19, 2025 • Stayed at: 410, Loop: 400s
In dry season, a water truck on main dirt street would be helpful. Staff was great, but buzzing around in golf cart created a dust cloud/s landing in/on campsite. For cost of site rental, dust control should be done.
Ronald H
VerifiedJuly 19, 2025 • Stayed at: 316, Loop: 300s
Michael P
VerifiedJuly 19, 2025 • Stayed at: 526, Loop: 500s
Beautiful location, enjoyed walks down to Snake River. Bathrooms were very clean. Staff was always very pleasant and helpful. Our second stay and will definitely go again in the future.
Tina B
VerifiedJuly 17, 2025 • Stayed at: 531, Loop: 500s
We loved staying at Flagg Ranch. We enjoyed the fishing and swimming in the river. Yellowstone and seeing the Geysers were amazing. We had some fun adventures at Jenny Lake and relaxed with paddle boards at String lake. We highly recommend staying here and enjoying the nearby attractions!
Tina B
VerifiedJuly 17, 2025 • Stayed at: 516, Loop: 500s
We loved staying at Flagg Ranch. We enjoyed the fishing and swimming in the river. Yellowstone and seeing the Geysers were amazing. We had some fun adventures at Jenny Lake and relaxed with paddle boards at String lake. We highly recommend staying here and enjoying the nearby attractions!
Tina B
VerifiedJuly 17, 2025 • Stayed at: 511, Loop: 500s
We loved staying at Flagg Ranch. We enjoyed the fishing and swimming in the river. Yellowstone and seeing the Geysers were amazing. We had some fun adventures at Jenny Lake and relaxed with paddle boards at String lake. We highly recommend staying here and enjoying the nearby attractions!
Christina B
VerifiedJuly 16, 2025 • Stayed at: 212, Loop: 200s
Love this place!
Deborah C
VerifiedJuly 14, 2025 • Stayed at: 422, Loop: 400s
A great campground at a great location, and we highly recommend staying at this location if you are visiting Yellowstone or Grand Teton.
Katie W
VerifiedJuly 14, 2025 • Stayed at: 106, Loop: 100s
Throughly enjoyed our time at Headwaters Campground. Check-in and out was easy, the facilities were very nice, and loved having the lodge and gas pumps on site. Location was perfect as a go between for Yellowstone and Grand Tetons National Parks. Would definitely recommend staying here.
rick k
VerifiedJuly 13, 2025 • Stayed at: 528, Loop: 500s
Great staff !
Beautiful location.
Fairly clean.
Not cheap.
Overall very good.
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!