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://ko.wikipedia.org/wiki/마우나로아산
Official website http://www.nps.gov/havo/planyourvisit/hike_maunaloa.htm
전화 +1 808 985 6178
주소 96718, United States
좌표 19°28'31.9" N -155°36'20.53" E