Climb Hallasan

Jeju Island (Jeju: 제주도; Korean: 제주도; Hanja: 濟州島; IPA: [tɕeːdzudo]) is South Korea's largest island, covering an area of 1,833.2 km2 (707.8 sq mi), which is 1.83 percent of the total area of the country. It is also the most populous island in South Korea; at the end of September 2020, the total resident registration population of Jeju Province is 672,948, of which 4,000 reside on outlying islands such as the Chuja Islands and Udo Island.

Hallasan National Park (Korean: 한라산국립공원, 漢拏山國立公園) is located in the province of Jeju-do, South Korea. It was designated as the 9th national park in 1970. It features the highest mountain in South Korea, the shield volcano Hallasan on Jeju Island. It was designated a UNESCO Biosphere Reserve in 2002, and a World Heritage Site in 2007.

On February 5, 1982, a Republic of Korea Air Force Fairchild C-123J crashed while on approach to Jeju International Airport, Jeju, South Korea. All 47 passengers and 6 crew were killed in the impact. It remains the fourth-worst accident in South Korean aviation history. The aircraft was engaged in a training mission and encountered bad weather before crashing near to Mount Halla, a dormant volcano.

Jeju Province (Jeju: 제주도; Korean: 제주도; RR: Jejudo; IPA: [t͡sed͡zudo]), officially Jeju Special Self-Governing Province (Jeju: 제주특벨ᄌᆞ치도; Korean: 제주특별자치도), is the southernmost province of South Korea, consisting of 8 inhabited and 55 uninhabited islands, including Mara Island, U Island, the Chuja Archipelago, and the country's largest island Jeju Island.