Mammoth Campground (Yellowstone)
Yellowstone National Park
Mammoth Campground (Yellowstone) in Wyoming is fully booked on Recreation.gov right now, but cancellations are frequent here — CampSage has caught 7 in the last 7 days. The fastest way to get a site is a free CampSage cancellation alert: we watch the campground and email you the moment one opens, so you can rebook it before anyone else.
⚡ EV charging nearby
Nearest DC fast charging: 6.9 mi away (straight line).
Distances are straight-line, not driving — the road can be much longer where a river, a lake or a canyon sits in between. From OpenStreetMap — community-mapped, so plug types can lag reality. Verify on your charging network’s app before counting on a charger.
🔭 Planning further ahead?
We watch the next 60 days closely — that's where cancellations show up. recreation.gov takes bookings out to about February 2027, so there may be 2+ night stays past our window.
📊 How often sites open up here
CampSage's scans caught 29 openings at Mammoth Campground (Yellowstone) over the last 30 days, on 24 separate days, most of them for stays 9–13 days out and the openings typically covered 2–3 nights.
These are the openings our own scans saw — not a figure the booking system publishes. We re-check availability several times a day, so the real number can be higher.
Ratings
📶 Cell coverage camper-reported
💡 Insider tips from campers
❓ Mammoth Campground (Yellowstone) FAQ
How do I reserve a campsite at Mammoth Campground (Yellowstone)?
Mammoth Campground (Yellowstone) in Wyoming takes campsite reservations through Recreation.gov. On this page, use the “Book / check availability” button to open the live booking page, see which dates are free, and reserve your site.
How can I get a spot at Mammoth Campground (Yellowstone) when it's fully booked?
Popular campgrounds like Mammoth Campground (Yellowstone) often fill months ahead, but campers cancel every day and those sites reopen for booking. CampSage checks availability for you and sends a free email the instant a cancellation opens — set an alert on this page and you can grab the spot before anyone else.
How often do campsites open up at Mammoth Campground (Yellowstone)?
CampSage's scans caught 29 openings at Mammoth Campground (Yellowstone) over the last 30 days, on 24 separate days, most of them for stays 9–13 days out and the openings typically covered 2–3 nights. These are the openings our own scans saw — not a figure the booking system publishes. We re-check availability several times a day, so the real number can be higher.
Is Mammoth Campground (Yellowstone) a good campground?
Mammoth Campground (Yellowstone) holds an average rating of 4.5/5 from 743 camper ratings on Recreation.gov. The full star breakdown is shown above.
Is there cell service at Mammoth Campground (Yellowstone)?
Of the carriers campers have reported on at Mammoth Campground (Yellowstone), Verizon rates highest at 2.4 out of 5 from 283 reports. See the carrier-by-carrier breakdown above — service can still vary by campsite, terrain, and weather.
Where is Mammoth Campground (Yellowstone) located?
Mammoth Campground (Yellowstone) is located in Yellowstone NP, Wyoming. Tap “Directions” above for driving directions, or see nearby campgrounds lower on this page.
📡 Get notified when this park frees up
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