Diamond Head is a volcanic crater landmark on Oahu, Hawaii, celebrated for its panoramic coastal views, rich military history, and rewarding hiking trail.
Diamond Head earned its English name in the nineteenth century when British sailors mistook calcite crystals glinting on the crater's slopes for diamonds. The formation itself is far older, the result of a single explosive volcanic eruption roughly 300,000 years ago that left behind a tuff cone now preserved as a state monument. Hawaiians knew it as Leahi, a name that likely refers to the brow of a tuna, describing the crater's distinctive ridge profile as seen from the sea.
The United States military recognized the strategic value of Diamond Head early in the twentieth century, constructing a network of tunnels, fire control stations, and observation posts inside and along the crater rim. These fortifications, built during World War I and expanded through World War II, are still visible on the trail today, and passing through the dim concrete tunnels and up the spiral staircase to a former military bunker is one of the hike's most memorable moments.
The summit trail covers roughly 1.6 miles round trip and climbs about 560 feet in elevation. The path is well-maintained and clearly marked, passing through open scrubland before entering the tunnel system near the top. At the summit lookout, the view takes in the full arc of Waikiki's shoreline, the Koolau Range inland, and on clear days the neighboring island of Molokai on the horizon.
Diamond Head remains one of the most visited natural landmarks in Hawaii for good reason. It offers genuine natural and historical depth within a short distance of one of the world's most famous beach resorts, making it a worthwhile destination in its own right.
Visit during the early morning hours, ideally before 8 a.m., to beat the heat and secure parking inside the crater before the lot fills.
Bring at least one liter of water per person, as there is no water available on the trail and the exposed terrain can feel significantly warmer than the coast.
Wear sturdy closed-toe shoes, since the trail includes steep staircases, uneven lava rock, and a narrow spiral staircase inside a military observation bunker.
Pause at the summit pillbox on the left before the main lookout for a quieter vantage point and a slightly different angle on the Waikiki skyline.
Combine your visit with a stop at Kapiolani Park at the base of Diamond Head for a shaded rest, local food trucks, and views back up at the crater rim.
Snorkel Waikiki’s clear waters and spot vibrant marine life with experienced guides on a relaxing 2-hour boat tour.
Watch the sun dip behind Diamond Head while naturalist guides share marine life insights
Snorkel from a power catamaran, then parasail 700 ft over Waikiki
Drive a Polaris Slingshot past Oahu’s coast and mountain passes
Charter your own Waikiki catamaran for sailing, snorkeling, and swimming
Build your own private Oahu tour with a local guide in 4–8 hours
Sail Waikiki at sunset with live music or a DJ on a BYOB catamaran with appetizers
Book the whole boat for a private Waikiki snorkel or cruise to Turtle Canyon
Cruise Waikiki at sunset with glass-bottom views and fireworks
Cruise Oahu’s south shore with complimentary drinks and Diamond Head views
Sail Waikiki Waters with Snorkeling Gear and Drinks Included
Sail Waikiki’s coastline with music, ocean views, and complimentary drinks
Sail Waikiki’s coast with ocean views and complimentary drinks
Cruise Waikiki’s reefs with snorkel gear, snacks, and drinks aboard
See Waikiki’s shoreline and Diamond Head as the day turns to sunset
Snorkel Hawaii’s reefs, then ride a Banana Boat or Bumper Tube
Snorkel, tube, and ride a Banana Boat from a 50-foot catamaran
Sail out for close-up views of Honolulu’s Friday night fireworks
Start your day on the water with coffee, breakfast, and Diamond Head views
Watch the sunset along Waikiki with an optional snorkel at Turtle Canyon
Ride coastal roads and hike to Diamond Head’s summit at your own pace
Private Honolulu bike tour customized to your plans
Cruise the Waikiki coast with your own drinks and snacks
Snorkel Turtle Canyon on a 2-hour semi-private catamaran with 6 guests max
Cruise off Waikiki to spot seasonal humpback whales (Dec–Mar)
Cruise Waikiki on a trimaran and listen for humpback whale songs
Sail Waikiki at sunset on a stable catamaran with drinks included
Mindful beachfront yoga in Waikiki with morning or sunset classes
Sail Waikiki’s coastline with local history, landmark views, and Diamond Head from the water
Sail Oahu’s south shore for Diamond Head and Honolulu skyline views
Circle Oʻahu with North Shore stops, Dole Plantation, and local food trucks
Sail past Diamond Head on a private 2-hour sunset yacht cruise
Sail on a private yacht near Waikiki and look for humpback whales
Sail Waikīkī and snorkel Turtle Canyon with gear, snacks, and drinks included
See Oahu’s North Shore: Dole Plantation, Haleiwa, surf spots and beach turtles
Snorkel Turtle Canyon with gear included and Diamond Head views
Swim with turtles and marine life off Oahu with expert guides
Take a private 60-minute Oahu helicopter flight with guaranteed window seats
Circle Oʻahu with coastal lookouts, temples, and local food stops
Snorkel Turtle Canyon on a semi-private Zodiac raft (max 6)
Bring your own drinks on a Waikīkī sunset sail with a swim stop
Sunset snorkeling, reef exploration, and water activities at Turtle Canyon
Cruise Waikiki to Diamond Head on a private 2-hour charter with bar and optional snorkel stop
Warrior-themed luau with mid-section Ali’i seating, buffet dinner, and drink tickets
Front-row VIP luau seating with feast, pre-show activities, and 3 drink tickets
Watch a warrior-themed Polynesian luau show with pre-show cultural activities
Private, customizable O‘ahu tour with a licensed driver and pickup for up to 14 guests
Warrior-themed Polynesian luau show with mid-section seating and digital photos
Diamond Head sail with snacks and unlimited nonalcohol drinks
Bike Waikiki to Diamond Head, then hike the crater summit
Sail and snorkel Turtle Canyon with lunch and drinks
Snorkel, slide, paddle, and kayak on a 3-hour Waikiki catamaran
See O‘ahu highlights in one day with a guided North Shore and Waimea Valley stop
Scatter ashes off Waikīkī by outrigger canoe, with photos included
Sail and snorkel off Diamond Head on a 40-foot catamaran
Circle Oahu in a day with a small-group tour to 30+ sights and 10+ stops
Take a 50-minute doors-off helicopter flight over Oahu’s top landmarks
Sail Honolulu at sunset with Diamond Head views and a full bar onboard
Snorkel a Waikiki reef with waterslide fun and a Diamond Head coastal cruise
Customize your flight height and glide over Waikiki for unforgettable aerial views with expert crew support
Climb above Honolulu on a solar-powered e-bike with rainforest views
Discover vibrant marine life and Diamond Head views on a guided Waikiki snorkel experience.
Sail out for Waikiki’s Friday fireworks with sunset views
E-bike to Diamond Head crater, then hike for Honolulu views—lunch included
Catch breathtaking island sunrise and enjoy gourmet donuts and bubbles on a private 2-hour cruise.
Sail to Oahu's original tiki bar at sunset for cocktails and coastal views
Parasail up to 1,000 feet with Diamond Head views
Private sunset raft cruise with time to swim off Waikiki
Private East Oahu day tour with 8 scenic stops, including Kailua and Byodo-In Temple
Build your own private Waikiki boat tour—snorkel, swim, or cruise Turtle Canyon
Snorkel Turtle Canyons with gear and life jackets included
2-hour Waikiki sunset sail with tasting menu and hosted bar options
Dance on a Waikiki sunset cruise with a live DJ and one included drink ticket
Cruise from Waikiki and snorkel with a friendly group
Tour Oahu’s top stops, then sail Waikiki at sunset on a Polynesian canoe
Sail Waikīkī at sunset with drinks and light bites included
9-hour Oahu circle island tour with 10 stops and a free pineapple per party
Hike Diamond Head and walk to Manoa Falls with a guide and admission included
Sail off Waikiki and snorkel Turtle Canyon for tropical fish and sea turtles
Cruise Waikiki at sunset on a private high-speed boat, with time to swim
Savor an Oahu sunset from the water with BYOB perks, scenic views, and chances to spot turtles and dolphins
Ride an e-bike around Diamond Head with a Kahala dolphin pool stop and shave ice
Private 2-hour sunset cruise for up to 30 in Maunalua Bay
Private 2.5-hour Waikiki cruise with snorkeling, fishing gear, and fresh poké
Soar up to 1,000 feet for panoramic Diamond Head and Waikiki views on a safe, small-group flight
Cruise from Waikiki and swim as the sun sets at sea
Sail Waikiki’s coast on a 1-hour BYOB cruise with Diamond Head views
See 30+ Oahu sights in 6–7 hours on a small-group island tour
Snorkel Waikiki’s coast with access to a floating ocean waterpark
Parasail up to 1,000 feet over Oahu’s south shore
Early-Morning Diamond Head Hike With Entry and Flexible Return
Private 8-hour Oahu circle-island tour with hikes, snorkeling, and local stops
Savor Polynesian cuisine alongside live island storytelling
Morning ocean views, swimming, and a flexible cruise along Oʻahu’s coast
Land at a private Waimea Bay overlook on a doors-off helicopter flight
Cruise Waikiki’s coast and look for humpback whales (Nov–Apr) with a complimentary Mai Tai
Snorkel Turtle Canyon with gear included on a 2-hour boat tour
Cruise Waikiki toward Diamond Head with drinks and snacks included
Private 4.5-hour yacht cruise for up to 6 with snorkeling and fresh poké
Private 3.5-hour Waikiki yacht cruise with snorkel and fresh poké
Private 3-hour Waikiki yacht cruise with snorkeling and fresh poké
Private 3-hour Waikiki yacht cruise with snorkeling and fresh pok0 for up to 6
Cruise Waikiki’s coast for seasonal whale watching, plus a complimentary Mai Tai
Learn to surf with a 2-hour lesson on a semi-private beach near Waikiki
Cruise Waikiki at sunset with a Turtle Canyon swim stop
Cruise Waikiki at sunset with a stop at Turtle Canyon
Ride a Polaris Slingshot full-loop photo route with built-in navigation
Hike Diamond Head and Makapu'u with round-trip Waikiki transportation
Sail Waikiki’s coastline at sunset aboard a double-decker catamaran
Cruise Waikiki’s southern coast at sunset with appetizers and water included
Snorkel Turtle Canyon with paddling and sailing on a 3-hour family-friendly cruise
Koa Classic luau: dinner, warrior show, and 1 drink ticket
Warrior-themed Polynesian show with VIP front seating and a lei greeting
Nā Lei Aloha hula show with international buffet at Hyatt Regency Waikīkī
Snorkel, catch the sunset, and watch Waikiki’s Friday fireworks from the water
Circle Oahu in a day with North Shore turtle snorkeling
Cruise Waikiki at sunset with live commentary and Diamond Head views
Circle Oahu in a day with Waimea and Byodo-In Temple entry included
Follow Barack Obama’s Oahu story through schools, landmarks, and coastal viewpoints
Fish offshore from a sailboat near Diamond Head
Private 3.5-hour Waikiki cruise with snorkeling gear and fresh poké for up to 6 guests
Friday sunset e-bike ride to Hilton Hawaiian Village fireworks
Sail at sunset for front-row views of Waikiki’s Friday fireworks, with drinks and a bento included