The Monument open daily except Thanksgiving, Christmas and New Year's day. Winter hours are from Labor Day to Memorial Day: 8:00 am - 4:00 pm. Summer hours are from Memorial Day through Labor Day: 7:30 am - 6:30 pm.

The Volcano Road is closed to vehicles after park hours.

July is the busiest month at the park, with about 15,000 visitors. The majority of visitors arrive between 10 am and 4 pm which sometimes causes delays of 15 - 30 minutes to tour the volcano. Plan to visit other than in July if possible or early or late in the day.

The park is open all winter, weather permitting. The park will close if the state highway to the area is closed. The volcano road will close at the discretion of park staff. Current road status is available by calling 505-278-2201 x302.