Stock Photo - Summit of Puu Ulaula. Maui. Hawaii. Summit of Puu Ulaula with departing several trekings foot or horseback to descend 900 meters into the bowels of the volcano ash filled paths. Haleakala Pu`u `Ula`ula Summit Hill. After leaving the Haleakala National Park Visitor Center at mile marker 20. 5 on Hwy 378, you´ll definitely want to head up to the summit.