Campsite Sniper
Wyoming · Recreation.gov

Headwaters Campground at Flagg Ranch

44.1052° N / 110.6677° W · Data Nov 2 2026, checked hourly
163 monitored sites

Sites at this facility

Campsite Sniper is not currently tracking online availability for this facility. The sites below are shown for reference only — they are not known to be unavailable. Check Recreation.gov for current dates.
Headwaters Campground at Flagg Ranch

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Availability is not tracked here yet

Campsite Sniper does not currently hold availability data for Headwaters Campground at Flagg Ranch. That is a gap in what Campsite Sniper tracks — it does not mean the facility is full, closed, or unavailable. Recreation.gov may well be showing open dates right now.

The site details and map below come from the public Recreation.gov record and are accurate. For current dates and to book, go to Recreation.gov.

01 · Detected Opening History · the openings record · file CS-258832

When Headwaters Campground at Flagg Ranch reopens

Headwaters Campground at Flagg Ranch's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 7 days
0
Openings · last 30 days
4
Openings · last 90 days
276

Weekday pattern

Detected openings by day of week · 90d
010203040506053344140362943MONTUEWEDTHUFRISATSUNOPENINGS RECORDED · LAST 90 DAYS · N = 276

No strong weekday pattern is evident in the openings Campsite Sniper has detected: 276 openings spread across the week.

Hour-of-day pattern

First detected by hour · local time · last 90 days
01020304031193427000408121620HOUR OF DAY (24H) · MT · LAST 90 DAYS

The largest concentrations of detected openings were first detected during the 11:00 and 14:00 local-time hours. Those hours contained 65 of 276 detected openings (23.6%). Hours show when Campsite Sniper first detected each opening, in Mountain Time, not when the change was made upstream.

Lead-time profile

Days before stay date · percentiles
P25 · 1DMEDIAN · 3 DAYS OUTP75 · 9.2D0306090120150180DAYS BEFORE STAY DATE

Half of the openings Campsite Sniper detected appeared at least 3 days before the stay date; the middle 50% land 1–9.2 days out. Set an alert if you want Campsite Sniper to monitor future openings.

Highest-churn sites

Most openings · 90d
SiteOpeningsShare of all openings
302  103.6%
324  93.3%
306  82.9%
514  82.9%
323  72.5%

Site 302 had the most detected openings in the last 90 days: 10. One free watch covers every site here.

About Headwaters Campground at Flagg Ranch

Overview

Availability will go live on Recreation.gov on a 6-month rolling basis for RV sites, Tent sites, and Camper Cabins.

Located in the John D. Rockefeller, Jr. Memorial Parkway, directly between Grand Teton and Yellowstone National Parks and just minutes from both, Headwaters Campground offers the perfect basecamp for exploration. Situated in a spectacular wooded setting with rolling hills and Teton mountain views, this campground is the perfect place to unwind and unplug, as there is limited cellular or internet service. Commune with nature and spot bear, moose, mule deer, and more as you stroll along nearby Polecat Creek. For avid anglers, the Snake River offers plentiful cutthroat trout, brook trout, and whitefish. While none of Headwater’s campsites are on the river, all are within walking distance.

The campground offers 34 tent sites, 97 full-hookup and pull-through RV sites, and 40 Camper Cabins, and is open from June to October. Visitors are encouraged to plan ahead and book early.

Recreation

The Headwaters area is a prime location for wildlife watching and photography. Walk along the banks of Polecat Creek through wildflower meadows and conifer forests to capture that perfect photo of a beaver, moose, elk, bison, bear, or birds. (Be sure to maintain appropriate distance!) Although soaking is not permitted, Huckleberry Hot Springs is an easy 2.5-mile loop that starts at Polecat Creek.

The Flagg Canyon trail is a good option for all ability levels. This 5.1-mile out and back hike winds through meadows and cliffs along the Snake River, and features a waterfall. There is plenty of wildlife to see in this area, including marmot, elk, and white-throated swift.

Facilities

Headwaters campground offers camping for tents, full-hookup camping for RVs, and hard-wall Camper Cabins. Each tent site has a gravel parking space for up to two vehicles, and tent pads for up to two tents. All RV sites are pull-through with gravel parking space for one RV and one tow vehicle with a maximum total length of 45 feet. Our RV sites offer full-hookups including sewer, water, and 20-, 30-, and 50-amp electric outlets. Propane is available for purchase at the campground office.

Headwaters Camper Cabins are scattered throughout the campground and include double-double or double-single bunk-style beds. While the bunks are padded, bedding and pillows not included. Guests are encouraged to bring their own linens, however a limited quantity of sleeping bags, pillows and blankets are available on a first-come basis for a nightly fee. Our Camper Cabins do not offer electricity or private restrooms, but do include a lantern.

All sites, including Camper Cabins, have a picnic table, a fire pit with metal fire grate, access to nearby water spigots, flush toilets, shower facilities, and coin-operated laundry facilities. Tent and RV sites also include food storage lockers. A phone is available in the lodge lobby for public use 24 hours per day.

ADA Access: The campsites and roads are well-compacted gravel and mostly level, with a gently sloping incline/decline that may make wheelchair access more challenging. Restroom facilities are wheelchair-accessible with one fully accessible shower. Routes to the amphitheater have a gently sloping incline/decline with compacted gravel, and are somewhat uneven.

Firewood, food, and ice can be purchased at the convenience store, and camping supplies, souvenirs, and more are available in the gift shop, both located in the main lodge. The main lodge also offers casual dining for breakfast, lunch, and dinner at Sheffields Restaurant and Saloon.

Natural Features

Headwaters at Flagg Ranch is situated in a tranquil setting along the upper reaches of the Snake River, surrounded by meadows and conifer forests. The Yellowstone Plateau rises to the north, and Huckleberry Mountain to the east.

Within walking distance is Polecat Creek, which runs through forests, wildflower meadows, and thermal features. For avid anglers, the Snake River offers plentiful cutthroat trout, brook trout, and whitefish. This area is known for its remarkable fly fishing and photography opportunities.

Headwaters is home to elk, moose, mule deer, wolves, black and grizzly bears, a wide variety of birds and more. Bears are often seen on trails and in the developed areas. Being prepared for an animal encounter can help ensure your safety as well as that of the wildlife that call this spectacular area home.

Nearby Attractions

One of the many reasons visitors return to Headwaters at Flagg Ranch year after year is its close proximity to Yellowstone’s south entrance, just a few miles north. But while it wouldn’t be difficult to spend all your time exploring our country’s very first national park (and the second-largest in the lower 48 states), there is much to see and do in the opposite direction as well. Take a self-guided tour of Grand Teton National Park via the 43-mile Scenic Loop Drive, offering an opportunity to photograph the park’s famous landscape and local wildlife. Spend a few hours at Colter Bay Village, located about 30 minutes south of Headwaters Campground, where you can rent a kayak or canoe, take a guided boat ride to the majestic base of the Teton Range, or just enjoy lunch and the stunning lake view from the marina. Continue on and stop in at the historic Jackson Lake Lodge for its famous huckleberry milkshakes and spectacular Teton views through 60-foot tall wall-to-wall windows. While you’re there, book a scenic raft trip or park bus tour. From there, continue south to the town of Jackson, located about 50 miles from Headwaters, where you can visit the National Museum of Wildlife Art just outside of town, walk under the famous giant elk antler archway in town center, attend the Jackson Hole Rodeo, browse local shops, and dine at one of the many restaurants.

163 monitored sitesRVs up to 45 ft93 with hookups152 shadedPets OKFire pitsMax party 10

Getting there

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.

1 Grassy Lake Road, Moran, WY 83013307-543-2861
AmphitheaterBirdingCampingFishingHikingHorseback RidingHotel/Lodge/Resort Fs OwnedInterpretive ProgramsPhotographyScenic DriveStar GazingVisitor CenterWildernessWildlife Viewing

View on Recreation.gov ↗   Get directions ↗

FAQ

How do I get a reservation at Headwaters Campground at Flagg Ranch?

Online reservations for this facility, where offered, are made through Recreation.gov. Campsite Sniper has also detected 276 site openings here in the last 90 days, so further dates may appear. Pick a site on the map to see its calendar, or set a free Campsite Sniper alert. You complete the reservation yourself on Recreation.gov.

Does Campsite Sniper book this campground for me?

No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.

How current is this availability data?

Campsite Sniper does not currently hold availability data for Headwaters Campground at Flagg Ranch, so there is nothing to date here. That is a gap in coverage — it does not mean the facility is full or closed. Check Recreation.gov for current dates.

How often do new openings appear at Headwaters Campground at Flagg Ranch?

Campsite Sniper detected 276 site-date openings here over the last 90 days, none in the last 7. A free alert watches around the clock and pings you the moment one appears.

Which sites at Headwaters Campground at Flagg Ranch fit a 35-foot RV?

78 of the 163 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 45 ft. 138 of those 163 sites have a recorded maximum length and 25 do not; they are not counted as fitting.

How far ahead of a stay do openings appear at Headwaters Campground at Flagg Ranch?

Half of the openings Campsite Sniper detected appeared at least 3 days before the stay date; the middle 50% landed 1-9.2 days out. Campsite Sniper can monitor future changes for dates you select.

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