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
Nova C
VerifiedOctober 2, 2024 • Stayed at: Mammoth site #16, Loop: A
Nice location. This is not remote and is offset of a local neighborhood. Worked great for our use quick stay over near the park.
Nicholas F
VerifiedOctober 2, 2024 • Stayed at: Mammoth site #71, Loop: Tent
Mammoth was great! Clean facilities, plenty of space, plenty of ELK, and beautiful scenery.
Wendy H
VerifiedSeptember 29, 2024 • Stayed at: Mammoth site #82, Loop: tent
We did rent camping in mid/late September it was cold. Definitely enjoyed being so close to the elk !
Tim B
VerifiedSeptember 26, 2024 • Stayed at: Mammoth site #17, Loop: A
The campground and park were super crowded even though it was mid-September. Most of the urinals and about 1/3 of the toilets in the campground were not working. Water spigots were communal and far apart. Some were inside occupied campsites, so I did not feel comfortable using them. There was no RV electricity, running water or sewers. No showers either. Cell service was one bar and only enough to receive texts. Internet service was nonexistent for campers. But National Park Service personal had top-notch internet and VoIP service. Crude and antiquated services were reserved for visitors.
Mammoth Campground is far away from most of the sights, too. It is inconveniently located. Most of the sights were jammed full. Parking often overflowed onto the road and created a hazardous situation for drivers and pedestrians. Traffic was heavy and jams were frequent. Many drivers were subsequently in a rush and drove too fast on open stretches of the antiquated two lane highways. Unsafe passing and refusing to stop for pedestrians was common. My average vehicle speed was 15 miles per hour (24.14 kilometers per hour). Gas and almost everything else was grossly overpriced. Gardner was only slightly better. $6.69 for a gallon of milk that cost $2.49 at Walmart. I tried hiking in the backcountry. The trails were well-worn and crowded when they were even open. Many are still closed after the flooding 3 years ago. Overall, not a pleasant experience.
GAIL H
VerifiedSeptember 26, 2024 • Stayed at: Mammoth site #23, Loop: A
Beautiful campground. Easy access to potable water. Nice, clean bathrooms.
chas s
VerifiedSeptember 24, 2024 • Stayed at: Mammoth site #71, Loop: Tent
Beautiful well maintained campground
Russell R
VerifiedSeptember 22, 2024 • Stayed at: Mammoth site #74, Loop: Tent
Perfect location
Elk roaming the site. Quiet clean and well serviced
Great hosts, great facilities and views
Very quiet now the road is diverited
James S
VerifiedSeptember 20, 2024 • Stayed at: Mammoth site #71, Loop: Tent
Nice campground very close to the mammoth hot spring, a very beautiful geological formation
Ron J
VerifiedSeptember 19, 2024 • Stayed at: Mammoth site #54, Loop: A
Clean , friendly staff , great location
Douglas W
VerifiedSeptember 19, 2024 • Stayed at: Mammoth site #82, Loop: tent
I have been coming to the park for 30 years and never camped in Mammoth CG... Now that the road to Gardiner doesn't go past it, it's pretty quiet. I like how the tent sites have gravel because it rained hard my last night and there was no mud under my tent. I would recommend Mammoth CG to anyone that wants to camp in Yellowstone.
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
