Mike S
VerifiedJune 19, 2025 Stayed at: 529, Loop: 500s
We stayed almost a week. It was fantastic. This was our second trip to the Tetons and stayed at Flagg Ranch CG. I wouldn’t stay anywhere else.
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2457 reviews
Headwaters Campground at Flagg Ranch is a well-maintained facility conveniently located between Yellowstone and Grand Teton, making it an ideal base for exploring both parks. Visitors appreciated the clean amenities, friendly staff, and additional features like a gas station, store, and free showers. However, some campers noted high prices at the store and close proximity of sites, which could lead to noise and lack of privacy. Overall, many expressed a desire to return due to the campground's positive aspects.
Based on guest feedback
4.3
Based on 2457 reviews
Showing 2457 reviews
June 19, 2025 Stayed at: 529, Loop: 500s
We stayed almost a week. It was fantastic. This was our second trip to the Tetons and stayed at Flagg Ranch CG. I wouldn’t stay anywhere else.
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June 20, 2025 Stayed at: 310, Loop: 300s
Park is conveniently located just south of the entrance to Yellowstone making it a easy drive to the park. The facility is older and could use some upgrading. We found the sites to be small and parking of your tow vehicle was difficult. Bath house could also use some upgrading as well. Showers were small, and the water temp difficult to keep consistent. They promote being bear aware which is a good thing however the garbage containers were typically full whenever we went to use them. Laundry machines are available but expensive compared to other places we have been.
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June 20, 2025 Stayed at: 310, Loop: 300s
Park is conveniently located just south of the entrance to Yellowstone making it a easy drive to the park. The facility is older and could use some upgrading. We found the sites to be small and parking of your tow vehicle was difficult. Bath house could also use some upgrading as well. Showers were small, and the water temp difficult to keep consistent. They promote being bear aware which is a good thing however the garbage containers were typically full whenever we went to use them. Laundry machines are available but expensive compared to other places we have been.
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June 20, 2025 Stayed at: 310, Loop: 300s
Park is conveniently located just south of the entrance to Yellowstone making it a easy drive to the park. The facility is older and could use some upgrading. We found the sites to be small and parking of your tow vehicle was difficult. Bath house could also use some upgrading as well. Showers were small, and the water temp difficult to keep consistent. They promote being bear aware which is a good thing however the garbage containers were typically full whenever we went to use them. Laundry machines are available but expensive compared to other places we have been.
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June 20, 2025 Stayed at: 310, Loop: 300s
Park is conveniently located just south of the entrance to Yellowstone making it a easy drive to the park. The facility is older and could use some upgrading. We found the sites to be small and parking of your tow vehicle was difficult. Bath house could also use some upgrading as well. Showers were small, and the water temp difficult to keep consistent. They promote being bear aware which is a good thing however the garbage containers were typically full whenever we went to use them. Laundry machines are available but expensive compared to other places we have been.
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June 21, 2025 Stayed at: 710, Loop: 700s
The location was perfect, the campsite was clean and well maintained, and the rangers patrolled often to ensure we were safe. I will absolutely stay here again.
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June 21, 2025 Stayed at: 610, Loop: 600s
The bathroom was really clean and I liked that there was running water and flush toilets. The campground was clean. The only con I have is that the mosquitos were terrible. I sprayed myself twice and had a citronella candle going and I was swarmed and later found I was bit up. A lot of people were inside their camper/tents, probably to escape the mosquitos. Other than the mosquitos, I had a really nice time here.
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June 21, 2025 Stayed at: 527, Loop: 500s
This is our 2nd time at Headwaters and we will come again! It is perfectly located to enjoy Yellowstone & the Grand Tetons easily. The grounds are safe and well maintained, the staff is knowledgeable and friendly, the store had everything we needed, and the campsites are shaded and not too crowded so we never felt like we were on top of the people next door.
Suggestions for improvement would be:
*Fix the squeek on the campground truck - it's pretty loud when doing the rounds early and late.
*Have a RV dump station ON SITE for those of us whose trailers are not tall enough to have sufficient drop to empty our Grey&Black tanks at our campsites. (The inlet was a good 10" above ground level) We were told we could use the nearest dump at Colter Bay campground - who had no sympathy and charged us $10 to use it. Not a deal-breaker, but definitely an inconvenience.
Other than that, we loved our trip! THANK YOU
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June 21, 2025 Stayed at: 710, Loop: 700s
The location was perfect, the campsite was clean and well maintained, and the rangers patrolled often to ensure we were safe. I will absolutely stay here again.
Helpful
June 21, 2025 Stayed at: 610, Loop: 600s
The bathroom was really clean and I liked that there was running water and flush toilets. The campground was clean. The only con I have is that the mosquitos were terrible. I sprayed myself twice and had a citronella candle going and I was swarmed and later found I was bit up. A lot of people were inside their camper/tents, probably to escape the mosquitos. Other than the mosquitos, I had a really nice time here.
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1 Grassy Lake Road, Moran, WY 83013 United States
Elevation: 2,088 ft
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 Yellowston...
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 mi from Old Faithful.
After exiting the south gate, Headwaters at Flagg Ranch will be just 2 mi 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 mi.
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.
The closest entrance is: South Entrance
Approximate drive: 2.4 mi · 4 min
The closest entrance is: Moran Entrance Station
Approximate drive: 24 mi · 41 min
Check out time
11AM
Last updated: November 4, 2026