Featured amenities
Pet Friendly
About Mammoth Campground (Yellowstone)
Number of accommodations: 81
Nearby Activities & Attractions
Fishing
Seasonal information
2026 Season availability
Campground Amenities
Most popular amenities
Pet friendly
Pets and Policies
- Pet friendly
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Rates, Sites & Availability
81 Sites Available
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Site Details
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81 Sites Available
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Reviews (560)
What Guests Are Saying
Mammoth Campground is praised for its beautiful scenery, convenient location near Lamar Valley, and friendly hosts who maintain a clean environment. Many campers enjoyed the spacious and accessible sites, as well as the wildlife sightings, particularly elk and bison. However, some visitors noted that only one bathroom was open during their stay, leading to inconvenience, and there were occasional issues with campsite reservations. Overall, it's considered a great spot for exploring Yellowstone, especially in the off-season.
What Guests Are Saying
Mammoth Campground is praised for its beautiful scenery, convenient location near Lamar Valley, and friendly hosts who maintain a clean environment. Many campers enjoyed the spacious and accessible sites, as well as the wildlife sightings, particularly elk and bison. However, some visitors noted that only one bathroom was open during their stay, leading to inconvenience, and there were occasional issues with campsite reservations. Overall, it's considered a great spot for exploring Yellowstone, especially in the off-season.
Review Summary
Holly B
VerifiedMay 19, 2025 • Stayed at: Mammoth site #32, Loop: B
The check in was easy. Very freindly staff. Restrooms were very clean and well stocked. The views are fabulous.
Jan Henrik G
VerifiedMay 17, 2025 • Stayed at: Mammoth site #26, Loop: B
Amazing location with fantastic view. Places for RVs and tents. Fire pits, public toilets and fresh water supply. No electricity, dumping station 20min away (in Gardiner at Sinclairs, 20$ fee). It was a real relaxing stay for some days :)
Dan O
VerifiedMay 17, 2025 • Stayed at: Mammoth site #58, Loop: A
It is a nice campground in a beautiful location. It was very quiet, though mostly filled. But, then again, folks are here to cruise YNP to chase baby bison, baby bears, goats, sheep, & moose (we found all those). You put in long hours and the campground is just a place to lay your head to prepare for tomorrow's adventures. Staff was friendly and professional and had answers for all of my off-the-wall questions.
I hate to highly recommend this campground because it will draw more visitors and . . . yes, I'm holding it close to my chest so that no one else will see. Thanks, YNP Staff, scenery and wildlife.
Jeffrey H
VerifiedMay 16, 2025 • Stayed at: Mammoth site #76, Loop: Tent
Good views from camp and clean facilities.
William M
VerifiedMay 15, 2025 • Stayed at: Mammoth site #74, Loop: Tent
May is a great time of year to visit. Quiet and not very crowded. Great stay!!
Danni S
VerifiedMay 14, 2025 • Stayed at: Mammoth site #78, Loop: Tent
Great campground. Stunning views, VERY clean and functional bathrooms. Nice staff. So clean and well-kept. Bison in your campsite are optional. :)
Joanne K
VerifiedMay 12, 2025 • Stayed at: Mammoth site #80, Loop: tent
We stayed at Mammoth for two nights on our recent trip to Yellowstone. The campsite was level and worked great for our van. The restrooms were clean and relatively close by. The sites were closer together than we usually like, but it was quiet and we enjoyed our stay. If you can get a site along the mountains (2-40 even #s) that would be ideal, enjoy!
Monica G
VerifiedApril 30, 2025 • Stayed at: Mammoth site #61, Loop: A
Was exactly what we needed.
Kelly L
March 11, 2025
It's great to have a place to camp during the winter months with heated bathroom. Reasonable rates for seniors, we can't afford to pay for hotels.
Enrique G
February 7, 2025
Nice campground for the winter, biggest plus is the heated bathroom with running water. Since there is only one available near the entrance the majority of campers set up near that area. Biggest disappointment was the Ranger coming by every morning at 8AM to check on my reservation. I had an 8 day reservation I showed him on the first day of camping (on the Rec.gov app) but he still came by every day to check. This was not a camp host, or a contractor, but a law enforcement park ranger. I would assume that he would remember that I was camping there and had paid my fee (since I was usually the only person camping there during the day) and did not need to check it every day. It's a little disconcerting having someone bang on the door of the RV every morning just to recheck something they should already know is good. And it was the same individual every day.....
Location Mammoth Campground (Yellowstone)
Address:
Yellowstone National Park
Yellowstone, WY, 82190
United States
Latitude & Longitude: 44.9736 / -110.693
Elevation: 1842 feet
Policies & Rules
General
- Mammoth Campground is managed by the park. If you are looking for campgrounds managed by Yellowstone National Park Lodges (Fishing Bridge RV Park, Bridge Bay, Canyon, Madison, and Grant Village campgrounds), please visit the Yellowstone National Park Lodges Camping website.
- RV or Camper Unit Delivery Prohibited. The delivery or pick-up of out-of-park RVs or other camper unit rentals is prohibited.
- Notify the Campground of Late Arrivals. To notify campground of late arrival or cancellation please call 307-344-2289
- Parking. All wheeled vehicles including trailers and motorcycles must be parked on parking pads or established roadways, so as not to block or restrict traffic in campgrounds.
- Camping Occupancy Limits. Maximum occupancy is six people per site. Camp only in designated sites. Camping is limited to 14 days from July 1 through Labor Day and to 30 days the rest of the year parkwide. The 44 day camping limit includes both concession- and park-operated campgrounds.
- Wildlife/Bear Regulations. ~Keep all food and related items - beverages, cooking utensils, stoves, pet food and, empty or full, food and beverage containers such as coolers, ice chests, and water jugs - locked inside your vehicle or stored in a food storage box, unless in immediate use. Bear resistant food containers must be kept in a vehicle, in a hard-sided camping unit, or in a food storage box. ~All trash and garbage must be disposed of in the provided bear-proof trash cans. Do not leave food related trash or garbage unattended. ~Washing dishes or clothing at campground hydrants or spigots is prohibited. Carry all dishwater/wastewater to the restroom toilet for disposal.
- Campfires and Firewood. Wood and charcoal fires are permitted. Campfires are permitted only in established fire grates. Fires must be attended at all times. Only dead, down, and detached wood may be gathered. Wood should not extend outside the fire grate perimeter. Do not break limbs off of standing trees, living or dead. Drown campfires thoroughly with water to make sure they are completely out. NOTE: Wood and charcoal fires may be subject to special restrictions due to fire danger. Restrictions will be listed on campground information boards and on the park's Current Conditions page. Propane grills and stoves are not usually affected by fire restrictions.
- Quiet hours are strictly enforced. No loud audio devices or other noise disturbances will be allowed during this time. Generators are prohibited between the hours of 8:00 p.m. and 8:00 a.m. Generators must be turned off durng the day when campsite is not occupied by site renter.
- Stay on Boardwalks and Trails. All travel in thermal areas is restricted to NPS designated trails and boardwalks.
- Fishing. To fish within the park, people 16 years of age and older are required to purchase and carry on their person a Yellowstone National Park Fishing Permit (you may purchase in advance). To learn more about fishing regulations, visit the park's Catch a Fish web page.
- 30 ft RV limit. From November through April.
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Last updated: June 4, 2026
