Mount Kaʻala, Oʻahu's tallest peak (4,025 ft)

Mount Kaʻala is Oʻahu's highest mountain at 4,025 feet (1,227 m). It's the top of the Waiʻanae Range on the island's west side, above Waiʻanae, Mākaha and Schofield Barracks. You can spot it from far away by the white FAA radar dome on its flat summit. The summit station is closed to the public.

• Elevation: 4,025 ft (1,227 m), the highest point on Oʻahu.
• Location: Waiʻanae Range, an old eroded volcano on the west side of the island.
• Summit: an FAA tracking station (the white dome), closed to the public and secured by the U.S. Army. The summit access road is not open to the public.
• Hiking: the trail from Waiʻanae Valley is about 7 miles round trip with roughly 3,600 feet of climbing, usually 4 to 6 hours. It's steep, narrow and muddy, with ropes and ladders in places. Experienced hikers only; don't go after heavy rain.
• Second-highest on Oʻahu is Puʻu Kalena, also in the Waiʻanae Range. The Koʻolau Range on the east side tops out lower, at Puʻu Kōnāhuanui (about 3,100 ft).

Sources: Wikipedia: Kaʻala · KHON2: Hawaiʻi's 8 tallest peaks

Last checked Nov. 1, 2026. Hours, fees and rules can change, so confirm with the official source before you go.