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4.0
20 votes

Mammoth Campground

Mammoth Hot Springs, Wyoming 82190 USA

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Wed 12a-11:59p
  • Independent
  • Pet Friendly
  • Wheelchair
    Accessible
  • Public
    Restrooms
  • No Wifi
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Our only year-round campground, Mammoth is located five miles south of Gardiner, Montana and the park's North Entrance. Situated in a high sage brush steppe above the Gardner River, scattered juniper and Douglas fir trees provide shade during hot summer months. The campground is close to fishing, hiking, and the famous Mammoth Hot Springs Terraces. Great wildlife viewing opportunities abound with elk and bison occasionally passing through the campground.

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Reviews of Mammoth Campground

19 people have reviewed this location

Ratings Summary

4.6 Access
4.6 Location
4.9 Cleanliness
4.5 Site Quality
3.9 Noise

Cell Coverage

Verizon 4G

Confirmed by 7 users | Last reported on October 03, 2022

AT&T 4G/5G

Confirmed by 5 users | Last reported on November 14, 2020

T-Mobile 5G

Confirmed by 1 users | Last reported on September 30, 2019

Reviews

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  • Photographer
  • 1,117 Reviews
  • 99 Helpful
May 26, 2015
Rated

Mammoth campground has 86 single-family campsites and is open year round. The campground is 5 miles from the North Entrance and is well suited for RVs (up to 75 feet). There are no hook-ups, but the campground does have flush toilets. Fifty-one of the campsites have tent pads and most are pull-through sites. The Gardner River is located a short distance from this campground. A store, restaurant, gift shop, and showers are located at the Mammoth Hot Springs area. Each campsite has a table, fire ring and grill.Season: Year Round.Mammoth Campground Best Campsites: 7, 18, 24, 32, 40, 44, 454, 46, 49, 51, 52, 53, 57, 69, 71, 73.

3 people found this review helpful

Reviewed by
aluminarium

  • 278 Reviews
  • 0 Helpful
September 10, 2014
Rated

The location and price are the best things about the Mammoth Campground in Yellowstone National Park.

The campground sits in a hairpin turn, so it is surrounded by road, which means there's a lot of road noise.

Camping is first come first serve, so it's hard to get a site here. We arrived at 12:30 on a Sunday and were given 3 choices in sites that we could fit into. One, they warned us would be too sloped, the other might work and the 3rd was definitely level.

I picked the one that "might" work because it seemed more private. Once we got into the site we quickly realized we made a mistake, so I ran back to the check-in office as they gave away the one that was definitely level.

I spotted another site that would work and asked if we could have that one even though it wasn't on the list of ones we could choose from. They reluctantly gave it to us because they thought it was a couple feet shorter than our rig. I'm not sure what they're using to measure sites, but we could fit our rig, our truck and another car in our spot if we wanted.

Cell service is totally unstable here. It's fine if you're on vacation, but if you're trying to work - don't stay here. We have a Wilson Sleek Booster and even with that the signal kept dropping.

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Nightly Rate: $20.00

Days Stayed: 6

Site Number: 60

RV Type: Travel Trailer

4 Access
5 Location
5 Cleanliness
4 Site Quality
3 Noise

Cell Coverage Rating

Verizon 4G

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Reviewed by
Campendium

February 03, 2015
Rated

Nice way to see the Lamar Valley in the early morning. Camped in June.

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Nightly Rate: $20.00

Days Stayed: 4

Site Number: -

3 Access
3 Location
4 Cleanliness
4 Site Quality
4 Noise
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Reviewed by
Campendium

May 03, 2015
Rated

Mammoth campground is a National Park campground near the northern entrance and is the only campground in Yellowstone that is open all year round. In May 2014 it was $20 a night (cash or credit card) with a maximum of 30 nights per year within Yellowstone NP. The sites are spacious and nearly all are pull throughs. We have a 35' 5th Wheeler and we had plenty of room in front and behind for our truck. The sites are not reservable, so it's first come first serve, which isn't an issue in May, as there are plenty of vacant sites here. There are many water taps around the park for you to get water that is drinkable. There is no dump station, but apparently there is one 10 miles away, north of Gardiner. The sites are quiet, clean and have fire rings. There are a number of clean restrooms in the campground with flush toilets, cold water, soap and electric hand dryers. You can use your generator during the hours of 8am to 8pm, quiet time in the campground is 10pm to 6am with a $50 fine for disobeying. Elk and Bison often roam the grounds and keep the grass down! The road around the campground is sealed while the sites are gravel with plenty of space in between. The town of Gardiner is five miles away and Mammoth Hot Springs is a few minutes by car or you could walk.

Stayed again in February 2015 and it's still $20, the bathrooms were heated, water was available and we were the only ones there, surprise surprise - it got down to -12F!

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Nightly Rate: $20.00

Days Stayed: 3

Site Number: numerous

RV Length: 35 ft

5 Access
3 Location
5 Cleanliness
5 Site Quality
5 Noise
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Reviewed by
Campendium

May 23, 2015
Rated

This is a first-come first-served campground that only offers dry camping. It is set up on a hill with a lovely view of the Mammoth Hot Springs area. The campsites are a decent size and have picnic tables. It appears that leveling is required for most, it was for our site. In some cases the tent sites can be a bit close to the RV sites - our bedroom window looked out over a tent. If a smaller rig were in our site that would not have been the case, however.

There are rest rooms and water spigots throughout the campground but no other amenities. There is also no dump site, they claim there is one in Gardiner, about fifteen minutes away past the North entrance to the park. They do have recycling.

There is a trail to the town of Mammoth Springs, which in turn offers several trails. The town has a brand new and very interesting visitor center. There is also a small general store, one restaurant and a gift shop. Fifteen minutes away in Gardiner, there is a real grocery store, several restaurants, public showers and a laundromat.

Elk come through the campground often, and this is bear territory, so grills, dog food bowls, utensils etc. must be stored inside the RV or car after use. The hill is a very nice place to walk the doggie, provided there is no wildlife around.

Generator use is restricted to between 8a.m. and 8p.m. a good idea since tents and RVs share close spaces.

We had decent internet access, which was a surprise, since that seems not to have been the case in earlier times.

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Nightly Rate: $20.00

Days Stayed: 5

Site Number: 37

RV Length: 25 ft

RV Type: Class C

4 Access
5 Location
5 Cleanliness
4 Site Quality
4 Noise

Cell Coverage Rating

Verizon 4G

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Reviewed by
Campendium

June 07, 2015
Rated

The sites are pretty large - we could have fit two Airstream and the truck in our spot. Everything is a pull through and dry camping, but not overly crowded. After staying at the Fishing Bridge RV Park this place felt roomy.

Supposedly had 4 bars of 4G, but it was pretty unstable and slightly frustrating. Sam had to drive out to the top of the hill one morning for a work meeting.

Definitely a beautiful area of the park, and the Elk wander the campground freely.

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Nightly Rate: $20.00

Days Stayed: 2

Site Number: 31

4 Access
4 Location
4 Cleanliness
4 Site Quality
3 Noise

Cell Coverage Rating

Verizon 4G

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Reviewed by
Campendium

June 02, 2017
Rated

Site was fine to base out of as we explored the area after a number of days at Madison. As mentioned, it is dry, but plenty of spigots around.

Only drawback is that it is situated in the inside of a climbing switchback...so some road noise.

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Nightly Rate: $20.00

Days Stayed: 2

Site Number: 59

RV Length: 24 ft

5 Access
5 Location
5 Cleanliness
4 Site Quality
3 Noise
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Reviewed by
Campendium

September 22, 2018
Rated

Located just inside the north entrance, the Mammoth Campground offers outstanding views in a dry, desert-influenced environment. The relative absence of trees made it easy for us to rely exclusively on solar power throughout our visit. We were here during September with high temperatures in the 70s, so we didn’t mind the absence of shade – but this area could be really hot in summer. Mammoth is an outstanding base to explore the northeastern portion of the park, including the Lamar Valley.

Mammoth is a first-come, first-serve campground but with one of the most organized check-in procedures we’ve ever encountered for a campground of this type. Incoming campers parked in designated lanes and were assigned campsites that would work for their rigs as sites became available. We stayed here in the weeks after Labor Day, and the lines started forming around 7 a.m. just about every day, with the line stretching out to the road by 8:30.

We love having wide open views, and really liked the layout of the campground in one long loop along the hillside, which provided good site separation. Both the upper and lower sides of the loop have excellent views across the valley to Mt. Everts. The sites numbered about 29 to 49 on the outside of the loop have particularly good views down the long valley toward Gardiner, but we found that end of the campground had no service on AT&T. We had 2 bars 4G in our site (65) and the sites on the southern end of the campground (the lowest and highest numbers) had the best signal for AT&T. However, the tower was so overloaded after about 8 a.m. that it was worthless during the day. If you need data access, plan to drive the 5 miles toward Gardiner. There is excellent service in town and also in the last several pullouts within the park that are within sight of Gardiner.

The layout of the campground lends itself to privacy since campers are strung out in a long line in two tiers, but it is within a switchback on the main park road so there is definitely traffic and road noise. For us, the road noise during the day – which was virtually nonexistent at night – was a fine tradeoff for the convenience of the location and the great views. Our site was very long and generally level, which was a nice surprise for a campground located on a hill.

There is a walking trail up the hill connecting the campground to the town of Mammoth Hot Springs, where there is a visitor center in one of the historic buildings, restaurants, a general store, a gas station, and of course the huge travertine terraces created by the hot springs. There are also several trailheads within walking distance of the campground. The Lava Creek trail starts across the main road and is used more by fishermen than hikers. One end of the Beaver Ponds Loop is located right behind the hotel.

Mammoth is home to a herd of elk, so be prepared to see elk traversing the campground as they head up or down the hill. We were inundated by elk during our visit in September, with groups of cows and calves in our campsite and feeding throughout the campground, especially in the mornings. The bulls also visited and we heard bugling every night.

Outside of being busy, the biggest issues with Mammoth are that the campground does not have showers, and also does not have a dump station. We ended up stopping at Canyon during our drives around the park to use their pay showers since we were stretching our tanks for an 11-night stay.

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Nightly Rate: $20.00

Days Stayed: 11

Site Number: 65

RV Length: 25 ft

RV Type: Travel Trailer

4 Access
5 Location
5 Cleanliness
4 Site Quality
4 Noise

Cell Coverage Rating

AT&T 4G

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Reviewed by
Campendium

October 07, 2018
Rated

We stayed in site 43 and had a beautiful view of the adjacent mountains. Sites are actually very level along the outside loop of the campground. Bathrooms were clean. Was awakened both nights by bugling elk which was pretty cool. At night, turn off all your lights and gaze at all the stars visible, absolutely beautiful.

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This reviewer would stay here again

Nightly Rate: $20.00

Days Stayed: 2

Site Number: 43

RV Length: 25 ft

RV Type: Travel Trailer

5 Access
5 Location
5 Cleanliness
5 Site Quality
4 Noise

Cell Coverage Rating

AT&T

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Reviewed by
Campendium

October 14, 2018
Rated

This place fills up fast even in October we stayed here 10-2-18 we want to soak in the boiling river, we did all day long it was great ! the best spots are on the outer rim try for 42 through 49. No showers but they have flush toilets, portable water and trash. Gardiner is close by they have a good pizza place Yellowstone pizza company we eat there twice and if you are looking for free WiFi go to the library in Gardiner and park at the park its right across the street you don't even have to get out of your car.

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This reviewer would stay here again

Nightly Rate: $20.00

Days Stayed: 1

Site Number: 49

RV Length: 13 ft

RV Type: Travel Trailer

5 Access
5 Location
5 Cleanliness
4 Site Quality
4 Noise

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Mammoth Campground

Mammoth Hot Springs
Wyoming
82190 USA
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Hours

Open 24 hours today
  • Sun - Sat: 12:00 am - 11:59 pm

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  • Unavailable
    Parking
  • Check
    Pets Allowed
  • Check
    Restrooms
  • Unavailable
    Wifi
  • Check
    Wheelchair Accessible
  • Unknown
    Credit Cards Accepted
Affiliation
National park
Last Nightly Rate
25.0
Longest Vehicle Length Reported
40 ft
Lowest Nightly Rate
10.0
Max Length
0 ft
Max Stay
14
Sites Count
82
  • Unavailable
    Paved Sites
  • Unavailable
    Fifty Amp
  • Unavailable
    Full Hookup
  • Check
    Rec Facilities
  • Check
    Pull Through
  • Check
    Tent Sites
  • Unavailable
    Dump Station
  • Check
    Big Rigs
  • Unavailable
    Open Seasonally
  • Unavailable
    Age Restricted
  • Check
    Boondock
  • Unavailable
    Cabin Sites
  • Unavailable
    Dispersed Sites
  • Unavailable
    Equestrian Sites
  • Check
    Firewood
  • Unavailable
    Fulltime Residents
  • Unavailable
    Group Tent Sites
  • Unavailable
    Laundry
  • Unavailable
    Mobile Homes
  • Unavailable
    Permit Required
  • Check
    Potable Water
  • Unavailable
    Propane
  • Check
    Public Water
  • Check
    Pull Through RV Sites
  • Check
    Reservations
  • Unavailable
    RV Sites
  • Unavailable
    Sewer Hookup
  • Unavailable
    Showers
  • Check
    Sites
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    Standard Tent Sites
  • Check
    Trailer Permitted
  • Unavailable
    Water Hookup
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