description Diamond Head Overview
Diamond Head, known in Hawaiian as Leahi, is a volcanic tuff cone on the southeastern coast of Oahu beside Honolulu and Waikiki. It formed during an explosive eruption, and its broad crater and prominent coastal profile later became a navigational landmark and a site of United States military fortifications. Now protected as Diamond Head State Monument, it has a maintained summit trail used by visitors for views of the crater, coastline, and Honolulu.
insights Ranking position
Diamond Head ranks #9 of 99 in the Butte ranking, behind East Mitten Butte, ahead of The Titan (Fisher Towers).
help Diamond Head FAQ
How difficult is the hike to the top of Diamond Head?
The summit trail is relatively short but includes steep stairs, switchbacks, tunnels, and exposed sections in Honolulu's heat. It climbs from inside the crater to coastal viewpoints overlooking Waikiki and the Pacific.
Do visitors need a reservation for Diamond Head?
Hawaii's reservation system generally requires out-of-state visitors to book entry and parking in advance. Residents and current rules may differ, so hikers should verify their category with the official Diamond Head State Monument site.
Is Diamond Head an extinct volcano?
Diamond Head, or Leahi, is a volcanic tuff cone created by an explosive eruption from the Honolulu Volcanics. The landmark is not a typical lava-built mountain, and its broad crater formed when magma interacted violently with water.
Why are there military structures on Diamond Head?
The United States developed Diamond Head as part of Oahu's coastal-defense system in the early 20th century. Fire-control stations and tunnels on the summit trail helped direct artillery batteries protecting Honolulu and its harbor.
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