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Diamond Head reservations are mandatory for visitors who do not live in Hawaii. The state park page for Diamond Head State Monument, checked on October 3, 2026, lists a $5 entry fee and $10 per vehicle for parking. Booking opens up to 30 days ahead, and anyone without a reservation is turned away.
I would book the earliest slot you can get. On exposed Hawaii hikes the cool part of the morning decides whether the walk is easy or a slog, and we have done enough hot, shadeless climbs with nieces and nephews along to plan around that first. This page covers how booking works, the fees, the hours, how to get there without a car and what the hike itself asks of you.
Do you need reservations for Diamond Head?
Yes, if you do not live in Hawaii. Reservations became mandatory for non-residents on May 12, 2022, according to the state monument page. Residents with a valid Hawaii driver’s license or state ID are exempt and show it at the gate.
Your guests are not exempt. The reservation FAQ says out-of-state guests of a resident still need reservations and entry tickets, and a new arrival who has no Hawaii ID yet books like a visitor. Children three and under do not pay, but everyone else who enters the park needs a ticket, even a family member who plans to wait at the bottom.
How do Diamond Head reservations work?
You book online at the state’s reservation site, gostateparks.hawaii.gov. The booking page says reservations may be made up to 30 days in advance, and that entry and parking are both bought there. It adds that people without a reservation are turned away.
Slots run through the day. The FAQ gives the first reservation period at 6:00 a.m. and the last at 4:00 p.m., with entry no later than 4:30 p.m. You must arrive within the first 30 minutes of your period, and a late arrival can lose both entry and parking with no refund.
Parked visitors have to leave by the end of their reservation period, because the lot is small and the next group needs the space. Those who walk in or get dropped off may leave after they finish the hike. Everyone exits through the tunnel to the crater exterior by 6:00 p.m.
Changes are allowed until midnight Hawaii time the day before. Refunds are available up to three days before your entry date, and the page says a $5 cancellation fee and service fees may apply. The FAQ says there is no refund for rain or other conditions outside the park’s control unless the park officially closes.
Diamond Head hike reservations
The state monument page lists these charges and says they are credit card only. The rows below come from that page and the reservation FAQ on the date checked.
| Item | What the page says | Cost | Notes |
|---|---|---|---|
| Non-resident entry | Reservation required | $5 | Children 3 and under are free |
| Non-resident parking | Bought online; leave by the end of your period | $10 per vehicle | Limited lot |
| Hawaii resident entry | Valid Hawaii ID or license | Free | Out-of-state guests still pay |
| Hawaii resident parking | No charge with ID | Free | A portion of the lot is held for residents, but a spot is not guaranteed |
| Changes | Until midnight Hawaii time the day before | $5 cancellation fee; service fees may apply | Refunds up to 3 days before entry |
| Storm closure | Official park closure only | Automatic refund, nonrefundable fees withheld | Rain alone is not a refund reason |
The page mentions service fees without giving a figure, so confirm the checkout total before you pay.
Do Diamond Head reservations sell out?
They can. The booking page says the park reaches capacity at peak times and recommends booking early. The morning slots go first, so book as soon as your dates are firm.
If the early times are gone, take a later slot or change the day. The window opens 30 days out, so a different date is the other way to land a morning time. A late slot works, but it leaves you hiking in the warmest part of the day.
Check again the evening before. Changes are allowed until midnight the day before, and the FAQ lets you buy extra entry tickets for a bigger party before your start time if space is available.
If nothing works, the crater is still worth seeing from outside. The Waikiki Trolley’s Diamond Head Line also lists a scenic photo stop at Kahala Lookout, and the crater fills the view east of Waikiki Beach. Our Oahu itinerary has other ways to fill the day.
Diamond Head hours
The park runs 6:00 a.m. to 6:00 p.m. daily, according to the state monument page. It lists Christmas and New Year’s as closure days. The last reservation is 4:00 p.m., and the last entry for it is 4:30 p.m.
Gates lock at 6:00 p.m. The FAQ says anyone still inside after that is trespassing, because the Department of Defense secures the park. With a 0.8-mile climb behind you, a late slot leaves little slack on a hike that takes 1.5 to 2 hours by the state’s own estimate.
In late August 2026 the state added an update about automatic refunds for storm-related closures, minus nonrefundable fees. Read the top of the state page for anything newer before you go.
How long is the Diamond Head hike?
The state page puts the hike at 0.8 mile from the trailhead to the summit, gaining 560 feet. It says to allow 1.5 to 2 hours, while the reservation FAQ says it typically takes 60 to 90 minutes. Plan around the longer figure, especially in heat or with kids.
The first stretch is easy. The state page describes a concrete walkway, built to reduce erosion, that gives way to natural tuff surface about 0.2 mile up the trail. From there the path climbs the crater wall in many switchbacks, with steep stairs near the top.
Diamond Head tunnel
The steep stairs lead into a lighted 225-foot tunnel, per the state page, so a flashlight is not on the gear list. Hikers go up and down through it, so keep right and let the people behind you pass. The tunnel exits into the Fire Control Station near the top.
Diamond Head summit
The Fire Control Station was completed in 1911. At the summit the state page lists bunkers and a large navigational lighthouse built in 1917. The shoreline view runs from Koko Head to Waiʻanae, and in winter it may include passing humpback whales.
The lookout gets crowded at busy hours. The state page calls the whole hike steep and strenuous and says it is not ADA accessible. Give each person a few minutes at the rail, then head down so the next group can have it.
What to bring to Diamond Head
The state page keeps the list short: good walking shoes, water, a hat and sunscreen. The trail has little shade on the way up, so the hat and the water do real work. I would carry more water than feels necessary for a 0.8-mile walk.
I would also use a small pack, so both hands stay free for the stair railings. Keep your booking confirmation easy to pull up at the gate. Our Hawaii packing list covers the rest of the suitcase.
Pets are not allowed in the park except service animals. The monument page also links a short video from Hawaii’s first responders, which is worth two minutes before you start.
Diamond Head parking reservations
Parking is bought online with the reservation, at $10 per vehicle for non-residents on the state monument page, and the lot is limited. You must leave by the end of your reservation period. If you are staying in Waikiki, skip the car.
Diamond Head bus
The simplest car-free option is the Waikiki Trolley’s Diamond Head Line, which lists Diamond Head Crater as a stop. Its page shows a first stop there at 7:10 a.m. and a last pickup at 3:20 p.m. A ticket runs $15.00 to $22.00 on that page and does not include park entry.
TheBus is the cheaper way across town. Its fare page lists $3.25 for a single cash ride with no transfers, and a $7.50 HOLO day pass valid for 24 hours from first use. TheBus’s trip planner is the place to find the route and stop for the monument from your hotel.
Whatever you ride, everyone still needs an entry reservation. Parking is the scarce thing here, which is why a bus, a trolley or a drop-off often beats driving. The FAQ lets drop-offs leave after their hike instead of by a parking slot’s end time.
Is Diamond Head worth it?
I would say yes for a first trip to Oahu, as long as you book the early slot. It is a short, steep walk with a real payoff: a tunnel, a flight of stairs and a view over Waikiki and the coast.
Skip it, or take the free views from outside, if anyone in your group cannot manage steep stairs or heat. If you are still choosing islands, our guide to which Hawaiian island to visit first compares the options.
When is the best time to visit Diamond Head?
Go early in the day. The first reservation period starts at 6:00 a.m., and the cool hours are the best ones on a climb of 560 feet with little shade. In winter the monument page says the summit view may include passing humpback whales.
Honolulu stays warm all year, so read the National Weather Service forecast for Honolulu the day before. Passing showers mean a slick tuff surface, so slow down on the descent.
Can you hike Diamond Head without a reservation?
No, not if you live outside Hawaii. The FAQ says anyone without a reservation is turned away, except local residents with a valid Hawaii state ID.
Do you have to pay to hike Diamond Head?
Non-residents pay $5 for entry and $10 per vehicle for parking, per the state monument page. Children three and under are free, and Hawaii residents with a valid ID are exempt.
How far in advance can you make Diamond Head reservations?
The booking page says reservations may be made up to 30 days in advance. Changes are allowed until midnight Hawaii time the day before.
What time does Diamond Head open?
The state monument page lists 6:00 a.m. to 6:00 p.m. daily. The last reservation is 4:00 p.m., and the last entry for it is 4:30 p.m.
How hard is the Diamond Head hike?
The state page calls it steep and strenuous: 0.8 mile and 560 feet of climb, with stairs and a lighted tunnel. It says to allow 1.5 to 2 hours, and the trail is not ADA accessible.
Prices are approximate, current as of publication, and change frequently — confirm the latest price with the retailer before buying.
Published October 14, 2026.
Photo credits: (1) featured, Diamond Head crater seen across the sand of… — shanstap, CC BY-SA 4.0, via Wikimedia Commons; (2) Diamond Head rising behind the high-rises… — InSapphoWeTrust from Los Angeles, California, USA, CC BY-SA 2.0, via Wikimedia Commons; (3) Visitors climbing the first staircase on… — verygreen, CC BY-SA 3.0, via Wikimedia Commons; (4) Hikers near one of the last tunnels before… — Daniel Ramirez from Honolulu, USA, CC BY 2.0, via Wikimedia Commons; (5) Crowd of hikers at the summit lookout of… — Daniel Ramirez from Honolulu, USA, CC BY 2.0, via Wikimedia Commons; (6) View southeast along the coast from the… — Famartin, CC BY-SA 4.0, via Wikimedia Commons; (7) Coastline and crater rim seen from the… — Daniel Ramirez from Honolulu, USA, CC BY 2.0, via Wikimedia Commons.