한라산국립공원

Hallasan National Park covers the central volcanic massif of Jeju Island, with Hallasan itself — at 1,947 m — as Korea's tallest peak south of the demilitarized zone. The national park protects the volcanic crater lake at the summit, the high-elevation alpine meadows, several distinct vegetation zones from temperate broadleaf forest to subalpine flora, and a network of major hiking routes (Eorimok, Yeongsil, Seongpanak, Gwaneumsa, Donnaeko). For travelers planning a serious Jeju trip, Hallasan is the single most important natural anchor — a UNESCO Biosphere Reserve and World Natural Heritage component — and a hike to Witseoreum or the summit is one of the strongest reasons to visit Jeju in any season.