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
Sarah M
VerifiedOctober 15, 2021 • Stayed at: Mammoth site #65, Loop: A
We stayed two nights. One night we had a reservation. Then a week later, after the snow storm had passed we came back. Online it said the campground was full. We drove up and asked in person if they had any cancellations and they did! It was Thursday afternoon. The volunteer Janet Lacey was kind and professional. Their bathrooms are heated and clean. Lots of elk in the campground. Really. Absolutely gorgeous.
Donna P
VerifiedOctober 13, 2021 • Stayed at: Mammoth site #58, Loop: A
The camp hosts are very friendly and helpful. The campground was very clean. We were in a RV so can't comment on the restrooms. A perfect to stay while visiting Yellowstone.
Martin V
VerifiedOctober 12, 2021 • Stayed at: Mammoth site #69, Loop: Tent
Mammoth is great.
Chris F
VerifiedOctober 12, 2021 • Stayed at: Mammoth site #74, Loop: Tent
Well maintained and clean. We camped there 10 years ago and each site did not have a bear box. Glad to see that each site does have their own now.
The only suggestion I would have is to have a dishwashing station near the bathrooms
Howard B
VerifiedOctober 11, 2021 • Stayed at: Mammoth site #65, Loop: A
BE AWARE THAT FRESH Water is available at site. No dump station.
Martin V
VerifiedOctober 11, 2021 • Stayed at: Mammoth site #35, Loop: B
Mammoth was really great and someday I hope to be a camp host volunteer.
Sebastian W
VerifiedOctober 10, 2021 • Stayed at: Mammoth site #35, Loop: B
My wife and I had a very pleasant experience. It was cool to hear the Elk at night and a great place for stargazing.
Michael T
VerifiedOctober 8, 2021 • Stayed at: Mammoth site #78, Loop: Tent
Despite being smack dab in the middle of the tent/car camp area (site 78 - with a nice shade tree), as well as being near the highway, the site was generally quite, sans one annoying neighbor shouting at their dog incessantly. The site, table and cooking grate were reasonably clean and level. The restrooms were clean and more developed than I expected (flush toilets). Staff, and most of the neighboring campers were very pleasant. We didn't get that vibe of being overtly supervised/policed. If you can get your reservation in early enough, the nicest sites appear to be along the periphery, especially on the north end of the campground.
Carma S
VerifiedOctober 7, 2021 • Stayed at: Mammoth site #24, Loop: A
Campground hosts were excellent.
Jeff N
VerifiedOctober 7, 2021 • Stayed at: Mammoth site #35, Loop: B
quiet campground . loved having elk roaming through during this time of the year and hearing their rutting calls. ranger was very friendly and the hosts stopped by to give us their firewood
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
