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
Newberry Volcano Newberry Volcano Newberry Volcano (also known as Newberry Caldera) is a large active shield-shaped stratovolcano located east of the major crest of the Cascade Range and about south of Bend, Oregon, within the Newberry National Volcanic Monument. Its highest point is Paulina Peak. The largest volcano in the Cascade Volcanic Arc, it has roughly the same area as the state of Rhode Island at when its lava flows are taken into account. From its northernmost to southernmost point, the volcano is in length, with a width of and a total volume of approximately . It was named for the geologist