Yellowstone National Park campsites, sold out? Here's how spots come back.

How booking at Yellowstone National Park works

Reservations for Yellowstone National Park are made through Recreation.gov. In peak season, the most popular campgrounds are typically claimed within minutes of each release — which is why the park reads as "sold out" for most of the year.

Sold out is not final, though. People book far ahead and plans change, so cancellations return to the official calendar throughout the season — with no announcement, at any hour. A cancelled site is bookable by whoever sees it first.

Booking facts

Managed by	National Park Service
Book through	Recreation.gov
Location	Yellowstone National Park, WY
Campgrounds	5
Official listing	Recreation.gov

Campgrounds in Yellowstone National Park

Set a watch on the whole park, or go straight to the campground you want — each one has its own availability and cancellation pattern:

Mammoth Campground (Yellowstone)	87 sites
Lewis Lake Campground	84 sites
Indian Creek Campground (WY)	73 sites
Tower Fall Campground	33 sites
Slough Creek Campground	17 sites

How itOpened watches Yellowstone National Park

We scan the official Recreation.gov calendar for Yellowstone National Park around the clock. The second a site that matches your dates and equipment opens up, you get a text with a direct link to that exact site. You book it yourself, in your own account, at the normal price. We never book, hold, or resell anything — monitoring is all we do, and it's what your fee pays for. Openings are first-come, so a text beats an email every time.

Page data refreshed 2026-10-29. Availability facts come from the official directory listing for Yellowstone National Park; cancellation statistics come from our own scanning logs.