A short, steep climb delivers 360-degree views of Honolulu, WWII history, and historic tunnels—all just minutes from Waikiki Beach. Here is how Outside’s editor tackled the 1.6-mile trail on a tight schedule.
Published September 5, 2026 05:20AM
Hawaii is known for its sweeping white sand beaches and turquoise-hued water, but many of the island state’s inland adventures hold just as much tropical wonder.
Hiking Diamond Head Trail on Oahu is one such excursion. Located just three miles from Waikiki and about 20 minutes from Honolulu’s airport, the 1.6-mile out-and-back trail is perfect for a day hike or, in my case, a quick stretch of the legs while on a layover. I even managed to squeeze it in just hours before Hurricane Lala hit Oahu in mid-August.
Also known as Lēʻahi, the trail meanders through Diamond Head Crater, a 300,000-year-old tuff cone formed during a single, massive volcanic eruption.
Beyond being a popular hiking spot, the trail is also rich in history. In 1908, the U.S. military built bunkers and stairs as part of its coastal defense system. After the 1941 Japanese attack on Pearl Harbor, the government closed off the crater to the public and used these previously constructed tunnels as lookouts, equipped the fort with radar, and established anti-aircraft guns along the crater’s rim.
With just 560 feet of elevation gain and mostly paved paths, the hike showcases these unique historical elements—including the famous 99 steep steps.
