Sobaek Mountains, largest range of mountains in southern South Korea. The range, 220 miles (350 km) long, stretches southwest from north of Taebaek Mountain (5,121 feet [1,561 meters]) in Gangwon Province to the Goheung Peninsula near Yeosu. Its high mountains, Sobaek (4,760 feet [1,451 meters]), Munju (2,437 feet [743 meters), Songni (3,468 feet [1,057 meters]), Deokyu (5,276 feet [1,608 meters]), and Baegun (4,190 feet [1,277 meters]), are watersheds for southern South Korea. Jirisan (6,283 feet [1,915 meters]), on its southwestern branch, is a national park.