4D2 Yellowstone National Park Backcountry — Yellowstone National Park

Yes. A Backcountry Use Permit is required year-round for all overnight stays in Yellowstone’s backcountry.

Yellowstone uses a designated backcountry campsite system. Each permit specifies a designated campsite and dates for the permit holder and their group.

The prime backpacking season is late June through the end of September. Access can be limited in May and June because of deep snow and swollen streams, and snow can return at higher elevations in September.

Yes. Walk-up permits are available in person during summer when backcountry offices are staffed. They are issued first-come, first-served, up to two days before the trip start date.

Trail conditions can change with snow, mud, and dangerous stream crossings, especially earlier and later in the season. The site says to check current trail conditions before your trip.