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Mammoth Campground (Yellowstone): how hard is it to reserve?
Yellowstone National Park · National Park Service · Mammoth Hot Springs, WY
As of Oct 10, 2026, 99% of Friday and Saturday site-nights at Mammoth Campground (Yellowstone) over the next 90 days are already reserved, compared with 78% of weeknights. Weekends are much harder than weekdays here — shifting a trip to Sunday–Thursday is the easiest way to get a site. In the next 30 days, 6 of 30 dates have at least one open site (89 open site-nights in total; 89 over 90 days).
Upcoming weekends
| Weekend (Fri–Sat) | Booked | Open sites Fri | Open sites Sat |
|---|---|---|---|
| Oct 16, 2026 | n/a | 0 | 0 |
| Oct 23, 2026 | n/a | 0 | 0 |
| Oct 30, 2026 | n/a | 0 | 0 |
| Nov 6, 2026 | n/a | 0 | 0 |
| Nov 13, 2026 | n/a | 0 | 0 |
| Nov 20, 2026 | n/a | 0 | 0 |
Snapshot history
| Snapshot date | Score | Weekends booked | Weeknights booked | Open dates 30d |
|---|---|---|---|---|
| Oct 10, 2026 | 93 | 99% | 78% | 6 |
About Mammoth Campground (Yellowstone)
- 81 campsites (81 listed in availability data)
- $25 per night
- Recreation.gov rating 4.5/5 from 832 reviews
- Equipment: Tent, RV, Trailer, Caravan/Camper Van, Pickup Camper, Fifth Wheel, Pop up
- Activities: Auto Touring, Amphitheater, Birding, Camping, Cross Country Skiing, Cultural Activities, Fishing, Hiking, Historic & Cultural Site, Interpretive Programs
Starting Tuesday April 15th, the Mammoth Campground is open and reservations are required. For reservations at the 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. There are many recreational opportunities in the Mammoth Hot Springs and the North area. Visit these pages to learn more: Boating Fishing Hiking Photography & Wildlife Watching Explore the boardwalks above Mammoth Hot Springs to view the the steaming Hydrothermal Features or …
Description excerpt from Recreation.gov.
Check live availability and book on Recreation.gov →
Other campgrounds in Yellowstone National Park
| Campground | Difficulty | Weekends booked | Open dates (30d) |
|---|---|---|---|
| Lewis Lake Campground Yellowstone National Park | Not measured yet | n/a | n/a |
| Indian Creek Campground (Wy) Yellowstone National Park | Not measured yet | n/a | 0 |
| Tower Fall Campground Yellowstone National Park | Not measured yet | n/a | n/a |
| Slough Creek Campground Yellowstone National Park | Not measured yet | n/a | n/a |
Nearby campgrounds
| Campground | State | Difficulty | Weekends booked | Open dates (30d) |
|---|---|---|---|---|
| Rainbow Point Campground Custer Gallatin National Forest | MT | Not measured yet | n/a | 0 |
| Pine Creek Campground Custer Gallatin National Forest | MT | Not measured yet | n/a | n/a |
| Bakers Hole (Mt) Custer Gallatin National Forest | MT | Not measured yet | n/a | n/a |
| Red Cliff Campground Custer Gallatin National Forest | MT | Not measured yet | n/a | 0 |
| Lonesomehurst Campground Custer Gallatin National Forest | MT | Not measured yet | n/a | n/a |
| Beaver Creek Campground Custer Gallatin National Forest | MT | Not measured yet | n/a | 0 |