Mauna Loa is one of five volcanoes that form the Island of Hawaii in the U.S. state of Hawaii in the Pacific Ocean. Mauna Loa is Earth's largest active volcano by both mass and volume. It was historically considered to be the largest volcano on Earth until Tamu Massif was discovered to be larger. Mauna Loa is a shield volcano with relatively gentle slopes, and a volume estimated at 18,000 cubic miles, although its peak is about 125 feet lower than that of its neighbor, Mauna Kea. Lava eruptions from Mauna Loa are silica-poor and very fluid, and tend to be non-explosive.
Mauna Loa has likely been erupting for at least 700,000 years, and may have emerged above sea level about 400,000 years ago. Some dated rocks are 470,000 years old.
You need to obtain permit for all overnight backcountry hiking and camping. You can apply for permit in person from the Backcountry Office at the Visitor Emergency Operations Center (VEOC) from 8:00 a.m. to 4:00 p.m. daily. Reservation in advance is not possible. The permits are free of charge.
Wikipedia https://en.wikipedia.org/wiki/Mauna_Loa
Official website http://www.nps.gov/havo/planyourvisit/hike_maunaloa.htm
Phone +1 808 985 6178
Address 96718, United States
Coordinates 19°28'31.9" N -155°36'20.53" E