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
Leah W
VerifiedJune 9, 2025 • Stayed at: Mammoth site #68, Loop: A
Great experience, as always. Top-notch friendly and helpful campground hosts, clean sites with beautiful views, easy proximity to Gardiner. All the NPS sites at Yellowstone have their own charms, but Mammoth is always my favorite.
Gabrielle V
VerifiedJune 8, 2025 • Stayed at: Mammoth site #83, Loop: tent
Easy check in and out. There appeared to be some hiking trails nearby. deep spaces but not alot of space between you and your next door neighbor.
Mario E
VerifiedJune 7, 2025 • Stayed at: Mammoth site #67, Loop: A
The campground is fine but the spots 66 and 67 are in a really step incline. It is impossible to level a camper which is quite bothersome.
Lindsay S
VerifiedJune 4, 2025 • Stayed at: Mammoth site #57, Loop: A
Site 57 was great. Nothing is totally private but this gave us some sense of privacy in a crowded campground. Enough space to park off the roadway and decent distance away from restrooms. Would definitely recommend!
ROBERT C
VerifiedJune 4, 2025 • Stayed at: Mammoth site #18, Loop: A
I Reserve site number 18 and probably one of the better sites in the campground. A great view overlooking the valley in the hills.. bathrooms were very clean.
AT&T has HOTSPOT had maybe one bar pretty much worthless Verizon wireless have up to four bars and pretty consistent
Brad C
VerifiedJune 4, 2025 • Stayed at: Mammoth site #30, Loop: B
The campground was great. The sites are long pull throughs that make it easy for larger trailers. The worst part of the whole experience was the process of getting a reservation at this campground. The web site says it is on a 6 month rolling basis but that is not really true. I was then told a specific date that spots would be released and that turned out to also not be true. I was then told they will be released 14 days in advance. I was lucky to get a spot. The reservation system was very frustrating.
Matisse L
VerifiedJune 3, 2025 • Stayed at: Mammoth site #18, Loop: A
Beautiful views, peaceful, in the middle of nature. Not too big, clean bathrooms, loved the fire pit. We were warmly welcomed by an adorable couple of volunteers!
William M
VerifiedJune 2, 2025 • Stayed at: Mammoth site #34, Loop: B
Spent innumerable nights at Mammoth, a special spot.
Henry S
VerifiedJune 1, 2025 • Stayed at: Mammoth site #40, Loop: B
I love camping at Mammoth. It is clean. The bathrooms are spotless. You're close to Lamar Valley, which is my favorite spot. I also love driving out to Chico Hot Springs for a soak and a meal after a hard day of looking for bears, moose, and wolves. I love being close to Mammoth Hot Springs for lunch and dinner. All in all, Mammoth is as good a campground as there is.
mehdi k
VerifiedJune 1, 2025 • Stayed at: Mammoth site #45, Loop: B
The tent bed is nice and flat. The campsite has a nice view. Its very close to a restaurant and grocery store. U can use the showers of the hotel for $5 with no time limitation.
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
