Odaesan, also known as Mount Odae-san or Mount Odae, is a major cluster of mountains and national park in eastern Gangwon Province, South Korea, standing at the junction of Gangneung City, Pyeongchang County and Hongcheon County. It stands at the junction of the Taebaek Mountains and the Charyeong Mountains, a spur range stretching to the west and serving to divide the South Han River / Namhan River from the North Han River / Bukhan River. It stands just to the south of Seoraksan and north of Dutasan along the Baekdu-daegan Mountain-system mainline, the range of granite peaks that make up the symbolic spine of the Korean Peninsula, but its peaks are more rounded and forested than most. National Highway 6 runs through the park, between the south main-entrance and the northeast corner descending to the east coast. It contain five main peaks surrounding a deep main valley running north to south, and several other subsidiary peaks, such as Noin-bong, with gorges between, a watershed forming a river leaving this area to the south. Just outside the western boundary of the national park area, another mountain Gyebang-san rises to 1,577 m (5,174 ft), higher than conventional Odae-san's summit, and they are connected by a 10 km long ridge; it is controversial whether or not to include this within the cluster or consider it as separate.

Pyeongchang is a county in the province of Gangwon-do, South Korea, located in the Taebaek Mountains region. It is home to several Buddhist temples, including Woljeongsa. It is about 180 km (110 mi) east southeast of Seoul, the capital of South Korea, and connected by expressways and high-speed passenger railways. Pyeongchang's slogan, "Happy 700 Pyeongchang", is taken from its average elevation of approximately 700 metres (2,300 ft).