(Arches National Park, UT) — Arches National Park is going to an updated timed-entry reservation system. It requires visitors to make online reservations to enter the park at a specific time for trips between April 1st and October 31st. Reservations are offered on a first-come, first-served basis at Recreation.gov and are released three months in advance in monthly blocks, starting on the first of each month. Reservations for July open on April 1st Entrance fees and annual passes also are available online.