Hawaii Volcanoes National Park, a national park on the island of Hawaii. Within its area of 358 square miles (927 km2) are two active volcanoes, Mauna Loa (13,677 feet [4,169 m] above sea level), one of the world's largest active volcanoes; and Kilauea (4,090 feet [1,247 m]). (See Kilauea; Mauna Loa.) Crater Rim Drive, a paved road 11 miles (18 km) long, encircles Kilauea Crater. The Thomas A. Jaggar Memorial Museum and the Hawaiian Volcano Observatory are on this road.
The park, also noted for giant ferns and other tropical vegetation, extends from the rugged seacoast to the summit of Mauna Loa. It was established by Congress in 1916.