Halemau'u Trail

Halemau'u Trail descends the dramatic inner wall of Haleakala crater — a 7-mile-wide, 2,600-foot-deep erosional depression (not a volcanic caldera in the traditional sense) atop Maui's highest peak at 10,023 feet. The trail begins on the crater rim at 7,990 feet and immediately drops through 32 tight switchbacks carved into the vertical pali wall, each turn revealing a different layer of the volcano's eruptive history. The path descends onto the crater floor proper, a stark landscape of rust-red and jet-black cinder cones with evocative Hawaiian names: Ko'olau Gap, Holua, and Bottomless Pit (an 80-foot lava tube shaft). The 'ahinahina — Haleakala silversword — blooms spectacularly along the descent; a single plant may grow for up to 90 years before producing one towering flower stalk and dying. Nene geese (Hawaii's state bird) nest on the crater floor, having been rescued from near extinction. The temperature swings 30–40°F between the cloud-swept rim and sunny crater floor. A timed entry permit is required for summit road access before 7 a.m. Overnight cabin reservations at Holua Cabin (inside the crater) are allocated by lottery and grant rare access to stargazing in complete darkness above the clouds. Pu'u o Maui cinder cone provides the trail's most photogenic summit view.