Things to Do
Diamond Head Hike: Reservations, Views, and Tips
What Diamond Head (Lēʻahi) is, what the summit hike is like, how reservations and fees work, and simple tips for a smooth visit on Oʻahu.
Diamond Head, known in Hawaiian as Lēʻahi, is a volcanic tuff cone on Oʻahu rising above the eastern edge of Waikīkī, and its summit trail is among the most walked hikes in Hawaii. The reward is a wide, unobstructed view over Honolulu, Waikīkī, and the Pacific stretching to the horizon. It is a manageable half-morning outing for most visitors, and it gives the whole coastline a context that the beach level never quite does.
What Diamond Head is
Lēʻahi was formed by a single violent explosive eruption tens of thousands of years ago, producing a tuff cone rather than a lava flow. The name "Diamond Head" came from 19th-century British sailors who mistook calcite crystals in the rock for diamonds. The Hawaiian name, Lēʻahi, is thought to refer to the shape of the ridge resembling the brow of a tuna (ahi). The U.S. military later built bunkers, tunnels, and observation posts inside the crater - structures the trail still passes through - and it is now managed as a state monument by Hawaii State Parks.
The hike
The trail is about 1.6 miles round trip and climbs the inner wall of the crater to the rim via switchbacks, two sets of stairs, and a short dark tunnel that opens onto the final push to the summit. It is moderate rather than strenuous - the elevation gain is around 560 feet - but there is almost no shade, and the exposed rock retains heat. Early morning is cooler, less crowded, and, at sunrise, genuinely spectacular. Wear real shoes, bring water, and use reef-safe sunscreen.
Reserve in advance
Out-of-state visitors must reserve entry, and parking if driving, ahead of time through the Hawaii State Parks system at gostateparks.hawaii.gov. Hawaii residents enter free without a reservation. Slots fill quickly in peak season - book as soon as your dates are confirmed.Reservations and fees
Reservations are timed, with a small entry fee plus a separate parking fee for those who drive in. Morning slots go fastest. If your preferred time is sold out, consider arriving by rideshare or bus and avoiding the parking fee entirely - it is a short ride from Waikīkī. The official booking link and other reliable resources are on our resources page.
Tips for your visit
Go as early as your reservation allows, carry more water than you think you need, and bring a layer - the summit can be breezy even when it is warm below. Pair Diamond Head with Waikīkī beach time and a visit to Pearl Harbor for a well-rounded Oʻahu day, and see our Oʻahu guide to plan around all three.
Oʻahu tours and activities
Guided hikes and Oʻahu day tours that can include Diamond Head, many with free cancellation.
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Frequently Asked Questions
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We research each guide against primary sources: the Hawaii Tourism Authority and Mālama Hawaii, the National Park Service, the State of Hawaii and its Division of State Parks, the National Weather Service, and the U.S. Census. For culture, language, and history we lean on the Office of Hawaiian Affairs, the Bishop Museum, and the scholarship of Mary Kawena Pukui. We send readers to those sources rather than speaking over them. When rules, prices, or conditions change, we update the page.