Rising above Waikīkī's high-rises and swaying palms, Diamond Head is the single most photographed landmark in the Hawaiian Islands — and for Oʻahu visitors, hiking it is practically a rite of passage. Known in Hawaiian as Lēʻahi, this extinct volcanic crater has been a navigational landmark, a military lookout, and now one of the state's most popular day hikes.
A Volcanic Icon with a Hawaiian Name
Diamond Head formed roughly 300,000 years ago during a single explosive eruption, leaving behind the broad, saucer-shaped crater that still dominates Honolulu's skyline. Native Hawaiians called it Lēʻahi, often translated as "brow of the tuna," because the ridgeline is said to resemble the dorsal fin of an ahi. The name "Diamond Head" came much later, coined by 19th-century British sailors who mistook glittering calcite crystals in the rock for diamonds.
Hiking to the Summit
The trail to the top of Diamond Head is short — just under a mile round trip — but steep, with switchbacks, a tunnel, and over 170 stairs leading to a WWII-era bunker at the summit. The payoff is a sweeping 360-degree view of Waikīkī, the South Shore coastline, and on clear days, the neighboring ridgelines of Koʻolau. Reservations are required in advance for both residents and out-of-state visitors, and the park opens early, which is worth taking advantage of before the heat and crowds build.
Tips for Visiting
- Book your entry time slot online before you go — walk-ups are not guaranteed.
- Bring water and sun protection; there's little shade on the trail.
- Arrive for one of the first entry windows to beat both heat and crowds.
- Wear real shoes — the stairs and uneven volcanic rock are not flip-flop friendly.
Diamond Head anchors the whole southeastern end of Oʻahu, and it's an easy pairing with a day spent along Waikīkī Beach or exploring the rest of the island's coastline and surf towns — the kind of island backdrop that shows up again and again in our Oʻahu collection of aloha wear.
Best Time to Go
Early morning is best, both for lighting and temperature — the crater offers no shade and can get hot fast once the sun is overhead. Weekdays tend to be quieter than weekends. However you time it, Diamond Head remains one of the few places on Oʻahu where you can take in the entire South Shore in a single glance.
Bring the islands home: Explore our Oʻahu Tees collection — original designs from our Native Hawaiian–owned studio in Kailua-Kona, Hawaiʻi. Here are a few of the newest additions:
Aloha Pipeline North Shore Tee — a tribute to the legendary North Shore wave, Banzai Pipeline.
Pipeline North Shore Tee — celebrating the world's most famous winter surf break.
Waikīkī Beach Surf Tee — honoring the birthplace of modern surfing.