Hallasan National Park (9.6 km), Seokgulam Trail (1.5 km), Gwaneumsa Trail (8.7 km), Donnaeko Trail (7 km), and Eoseungsaengak Trail (1.3 km). The longest trail is Seongpanak Trail which takes about 4.5 hours. Hallasan comprises 153.112 km of the Jeju Island. It rises 1.950 m above the sea level which means the highest mountain in South Korea. This mountain was formed in the fourth Cenozoic era by outburst of volcano. It is mostly composed of basalts. It is extending east and west, and it has high and gradual descent. On the other hand, the south part of the mountain is steep. In the
East Molokai Volcano shield volcano of East Molokai and is considered to represent the last volcanic phase of East Molokai. East Molokai was one of the seven principal volcanoes along with West Molokai, Lānai, West Maui, East Maui, Penguin Bank and Kahoolawe that formerly constituted the island of Maui Nui. The highest point is the peak called Kamakou on the southern rim at . The Pēpēōpae bog is just below the rim. The northern flank of the volcano has been truncated by enormous cliffs rising from the sea. The sea cliffs were formed when the northern third of the East Molokai Volcano suddenly