Intended for experienced hikers with strong endurance and confidence in challenging terrain.
On Oʻahu’s southeastern shore near Hawaiʻi Kai, a challenging path climbs the side of a volcanic crater. Known as the Koko Crater Railway Trail, or simply “Koko Head,” this intense hike follows a set of old railway tracks—remnants of a World War II-era military tramway. Ascending nearly a thousand feet in under a mile, the trail offers one of the island’s most iconic cardio challenges, leading to a sweeping 360-degree view from the summit.