AAA Editor Notes
Haleakalā Summit District covers a major portion of Haleakalā National Park. Haleakalā is an enormous volcano 10,023 feet above sea level. Streams eroded deep valleys into its flanks during a long period of volcanic inactivity. Subsequent lava flows spread over the valley floors and formed a new floor, which is punctuated with cinder cones up to 900 feet high. The most recent volcanic activity was 200-400 years ago at a low elevation near Wailea.