Booking rules by state
Mountain West, state by state
Seven agencies, seven booking systems. Here's the one-line version of each, with the source.
- Colorado
Every Colorado state park campsite is reservation only. Each date opens 6 months ahead, one day at a time.
Colorado Parks and Wildlife: Camping, checked November 2, 2026
- Utah
Individual campsites book on a rolling 4-month window. Utah's example: on January 10, sites are bookable through May 10.
Utah State Parks: Park Rules (Campsite Reservations), checked November 2, 2026
- Arizona
Campsites can be booked up to 365 days ahead and as late as one day before arrival.
Arizona State Parks: Reservation and Cancellation Policies, checked November 2, 2026
- Nevada
Dates open on a rolling 11-month window, with new inventory at 8 a.m. Pacific each day, on Reserve Nevada.
Nevada State Parks: Reservations, checked November 2, 2026
- New Mexico
Reservable campsites can be booked 6 months ahead. Most campgrounds keep only some sites reservable.
New Mexico State Parks (EMNRD): Camping, checked November 2, 2026
- Montana
Campsites can be reserved only for nights from the third Friday in May through the third Sunday in September.
Montana FWP State Parks: Fees & General Information, checked November 2, 2026
- Wyoming
Wyoming's 2026 reservation page: residents book up to 120 days before arrival, non-residents up to 113 days; new inventory at 7:00 a.m. Mountain daily.
Wyoming State Parks: 2026 Reservation Information, checked November 2, 2026
Sources
- Colorado Parks and Wildlife: Camping, checked November 2, 2026.
- Utah State Parks: Park Rules (Campsite Reservations), checked November 2, 2026.
- Arizona State Parks: Reservation and Cancellation Policies, checked November 2, 2026.
- Nevada State Parks: Reservations, checked November 2, 2026.
- New Mexico State Parks (EMNRD): Camping, checked November 2, 2026.
- Montana FWP State Parks: Fees & General Information, checked November 2, 2026.
- Wyoming State Parks: 2026 Reservation Information, checked November 2, 2026.
Rules change. Always confirm on the official site before you rely on a date.