Diamond Head

Diamond Head offers one of Oahu's most rewarding short hikes, leading to panoramic views of Waikiki, downtown Honolulu, and the Pacific Ocean from inside an ancient volcanic crater. The 1.6-mile round trip trail climbs 560 feet through military bunkers and tunnels built during World War II, ending at a concrete observation platform perched on the crater rim. The moderately challenging hike takes most people 1.5 to 2 hours total. You'll encounter steep sections, narrow tunnels, and two sets of stairs - one with 99 steps and another with 76. The terrain includes paved walkways, dirt paths, and rocky areas that become slippery when wet. Start before 8am to avoid crowds and heat. The trail gets packed by mid-morning, especially on weekends. Bring plenty of water, sunscreen, a hat, and wear sturdy shoes with good grip. A flashlight helps in the darker tunnel sections, though most phones provide adequate light. Park at the crater entrance lot, which fills by 9am most days. Entry costs $5 per vehicle for Hawaii residents, $10 for non-residents. The gate opens at 6am and closes at 6pm daily, with last entry at 4:30pm. This hike suits most fitness levels, though the stairs and elevation gain challenge some visitors. Kids and older adults regularly complete it. The tunnel sections provide brief shade breaks, but most of the trail offers little sun protection. Skip this hike during heavy rain when rocks become dangerously slick. Morning visits from December through March offer the coolest temperatures and clearest views.