About this permit
Mount Rainier sells its overnight wilderness through one Recreation.gov product, and a permit is required year-round for every overnight stay in the backcountry. A separate climbing permit is required for travel above 10,000 feet or on glaciers. The reservation is not the permit: the park's rule is that permits must be obtained in person at a wilderness information center or visitor center, and a reservation not claimed by noon on your start date is cancelled.
Cancellations return to Recreation.gov through the season, and a cancellation alert catches them. For the 2026 season the early-access lottery took applications from February 10 at 7:00 am PT to March 3 at 7:00 pm PT, notified applicants on March 14, and opened awarded booking windows from March 21. General on-sale was April 25 at 7:00 am PT. October 12 is the last date campsites can be reserved; on October 13 the wilderness information centers close, self-registration becomes available at some locations, and permits go first-come, first-served at the Longmire Museum.
Costs are $6 to Recreation.gov plus $12 per person per night, for up to 13 consecutive nights, and youth 15 and under are free. The park says about two thirds of summer season backpacking and climbing permits are made available for advance reservation, with the remaining one third issued at wilderness information centers first-come, first-served no more than one day before the trip start.
Two current conditions change how you plan a 2026 trip. A parkwide fire ban has been in effect since June 26, 2026 until lifted: no campfires, no wood, briquettes or any fuel in fire pits, fire pans or grills, though portable stoves and lanterns burning liquefied or bottled fuel are still allowed. And the Grand Park 2 Fire has Sunrise Road and White River Road to SR 410 closed until further notice as of the park's August 7, 2026 update, which takes the White River Wilderness Information Center off the map. The Longmire and Paradise wilderness information centers are both still reachable and both issue permits.
The route
The park's own three-part structure is worth understanding before you book. Designated trailside camps are metered by the number of parties, and each has one to eight improved sites that hold a party of one to five, roughly three small two-person tents. Many also carry a group site for parties of 6 to 12; the park says those exist at 25 designated camps. Cross-country zones are metered by parties in administrative sub-zones, need a camp at least a quarter-mile from any road or trail and 100 feet from water, and are closed to anyone hiking the complete Wonderland Trail. Alpine zones, where the park says generally only climbing activity occurs, allow camping only on permanent snow or ice or on bare ground previously used as a campsite.
The party-size rule follows that structure and is easy to get wrong. In summer the limit is five people at individual trailside sites, in cross-country zones, and camping on bare ground in alpine zones. Six to twelve counts as a group and needs a group site or, in an alpine zone, snow to camp on. In winter the limit is twelve everywhere. The park defines summer as May 15 to September 30, plus any date outside that window when snow depth is under two feet.
Why it matters
Rainier does not sell a separate campsite reservation and a separate permit. The wilderness permit IS the reservation, it is required year-round for every overnight stay in the backcountry, and a climbing permit is required on top of it for travel above 10,000 feet or on glaciers. Everything from a single night at a trailside camp to a full Wonderland circuit runs through this one product.
