Haleakala, Hawaiian Haleakal "House of the Sun" is a shield spring of gushing lava, south-focal Maui Island, Hawaii, U.S. It is a focal component of Haleakala National Park. Haleakala has one of the world's biggest lethargic volcanic pits, which was framed chiefly by disintegration and measures around 20 miles 30 km in circuit. In a few places the edge of the pit rises in excess of 2,500 feet 760 meters over the whole floor. Haleakala was last dynamic in the late eighteenth century and is the bigger of the two volcanoes that frame the island of Maui. The name Haleakala gets from the legend that the demigod Maui detained the Sun there with a specific end goal to protract the day.