Mauna Kea State Recreation Area also known as Mauna Kea State Park, is a state of Hawaii protected area at the southern base of Mauna Kea. The 20.5-acre park is administered by the Hawai'i Department of Land and Natural Resources. The park is located on Saddle Road 35 miles west of Hilo, at 19°44′57″N 155°31′35″W / 19.74917°N 155.52639°W with ab…Mauna Kea State Recreation Area also known as Mauna Kea State Park, is a state of Hawaii protected area at the southern base of Mauna Kea. The 20.5-acre park is administered by the Hawai'i Department of Land and Natural Resources. The park is located on Saddle Road 35 miles west of Hilo, at 19°44′57″N 155°31′35″W / 19.74917°N 155.52639°W with about 6,500 feet elevation. Facilities include restrooms, cabins and camping, trash cans, and a picnic area. As of 2010 water improvements are planned.