The Haleakalā climb starts in Paia, at 46 m of elevation, in Hawaii. The route follows the Paia side for 57.7 km to the summit. From this low point, the road almost never drops: total descent over the whole route is just 115 m.
After Paia (km 0, 46 m), the road climbs to Makawao, at 496 m, at km 10.1. Past this village, the ascent continues with no stop in between: the longest climb of the ascent runs from km 23.6 to the summit at km 57.7, a single stretch of 2,001 m of elevation gain.
The summit of Haleakalā sits at 3,045 m, for a total elevation gain of 3,055 m from Paia. The average grade of the climb is 5.3%, over a distance of 57.7 km: the gap between the 46 m start and the 3,045 m summit sets the scale of the climb.
Paths and places: © OpenStreetMap contributors. Altitudes measured on the route.