No reservation to enter the park during the day, but anyone entering the summit district for sunrise (3–7 a.m.) needs an advance reservation.
Sunrise reservation: Anyone entering the summit district for sunrise (3–7 a.m.) needs an advance reservation. Reservations release 60 days ahead at 7 a.m. HST, and a portion releases 2 days ahead.
Campgrounds & wilderness cabins: Overnight stays in campgrounds or cabins must be reserved in advance through Recreation.gov. Cabins can be booked up to 6 months ahead ($75 per night, three nights in a row at most).