Hours & Fees

Diamond Head State Monument is open every day from 6 a.m. to 6 p.m., except Christmas Day and New Year's Day. The last reservation is 4 p.m. and the last entry is 4:30 p.m. Non-residents pay $5 per person to enter and $10 per vehicle to park, by credit card only, booked in advance. Hawaii residents with a Hawaii ID or driver's license get in free.

Park Hours

• Open: 6 a.m. to 6 p.m. daily.
• Last reservation slot: 4 p.m.
• Last entry: 4:30 p.m., for the 4 p.m. slot.
• Gates close: 6 p.m. Everyone must be out through the tunnel by then.
• Closed: Christmas Day (December 25) and New Year's Day (January 1).

After 6 p.m. the Department of Defense secures the park, and the reservation site warns that anyone still inside is trespassing and may be prosecuted. The 2012 brochure puts it plainly: the tunnel gate closes at 6 p.m., so do not get locked in.

Entrance Fees

Non-residents

• Entry: $5 per person.
• Children 3 and under: free.
• Parking: $10 per non-commercial vehicle.

Hawaii residents

• Entry and parking: no charge with a Hawaii driver's license or state ID. Residents do not need a reservation, but parking is not guaranteed. Residents who walk in are always admitted.

Commercial vehicles (reservation through the separate PUC portal)

• 1 to 7 passengers: $25.
• 8 to 25 passengers: $50.
• 26 or more passengers: $90.

All fees are paid online when you book, by credit card only; no cash is taken at the entrance. Everyone who enters needs an entry ticket, even if they will not hike. There is no military discount.

How the Fees Have Changed

In 2020 the state raised the fees from $1 per walk-in and $5 per vehicle to today's $5 per person and $10 per vehicle. Reservations for non-residents followed on May 12, 2022. See reservations.

Visitor Center Hours

The Diamond Head Visitor Center inside the crater, run with Pacific Historic Parks, keeps its own hours: 7 a.m. to 3:30 p.m. daily, closed December 25 and January 1. See visitor center.

Best Time of Day

The agency built the reservation system to move hikers away from the crowded morning hours and into the quieter afternoon. Mornings are the busiest time. Afternoons are hotter, so carry more water. Allow 1.5 to 2 hours for the hike so you finish well before the 6 p.m. close.

Closures

The park can close for storms or emergencies. Check the Hawaii State Parks park notices before you go. When state parks closed for storms in 2026, the agency refunded reservations for closed days automatically.