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
Rio L
VerifiedOctober 19, 2024 • Stayed at: Mammoth site #42, Loop: B
The site was great pull through was definitely a plus. Table and fire pit were nice. Bathroom was very clean and soap dispensers. Recycling was great to see. Conveniently located, loved hearing the elk bugle and coyotes howling. Even caught the Northern Lights. If they had electric and water hookups I would have given a 5. Thanks
Kate P
VerifiedOctober 15, 2024 • Stayed at: Mammoth site #25, Loop: A
Wonderful little park with some great views!
Nari B
VerifiedOctober 14, 2024 • Stayed at: Mammoth site #76, Loop: Tent
Great sites (though they're close together) with elk herds wandering through. Cell service sat at 1-2 bars, which was convenient.
Tom D
VerifiedOctober 14, 2024 • Stayed at: Mammoth site #17, Loop: A
Large herd of Elks below campground. Bull #24 was in rare form. Love this campground in late fall.
Peter Š
VerifiedOctober 12, 2024 • Stayed at: Mammoth site #71, Loop: Tent
Nice campground.
Really helpful staff.
Clean toilets, well maintained.
Michele W
VerifiedOctober 11, 2024 • Stayed at: Mammoth site #25, Loop: A
The location of Mammoth Campground is fabulous - being located within Yellowstone is a real treat! The site that I had reserved (25 Loop A), unfortunately, had a significant slope toward the front which made leveling challenging and a bit dangerous. After many tries, I ended up having to go the wrong way down the one-way road to position the trailer in the other direction. So normally it takes me 15-20 minutes to get set-up and this issue caused me a 1.5 hr delay in getting out in the park. The restrooms were clean and the views were beautiful!
Hongguang F
VerifiedOctober 8, 2024 • Stayed at: Mammoth site #40, Loop: B
Great view with clean facilities.
Roy B
VerifiedOctober 8, 2024 • Stayed at: Mammoth site #55, Loop: A
Friendly staff. Great views. Elk in town. Visitors center would not take cash?!
morgan m
VerifiedOctober 4, 2024 • Stayed at: Mammoth site #23, Loop: A
Good sized site that was quite level, rangers were helpful, clean campground and bathrooms, nice views, quiet (besides the elk bugling lol)
Sue R
VerifiedOctober 4, 2024 • Stayed at: Mammoth site #16, Loop: A
We lived our site at Mammoth. We heard the elk bugling and had a beautiful sunset.
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
