This non-technical route explores the Haleakala volcano crater. Leave an exit vehicle at the Halemauu trailhead and drive to the top of the volcano. Hike down to the Haleakala volcano to the Bottomless pit, which can be rappelled with technical gear. One of the highlights is the lavatube near the end that was formed by counter flows in the caldera. The exit hike is strenuous so prepare for sun, heat and possible rain.