태백산맥
Ch'angdo lies to the west of the Taebaek Mountains, in the Ryŏngsŏ region of Kangwŏn, but is nonetheless quite rugged. The highest point is Okpatpong (옥밭봉), 1240 m above sea level. Ch'angdo lies just north of the Korean Demilitarized Zone. The chief stream is the Pukhan River, which flows southward across the DMZ into South Korea. Roughly 80% of the county's area is forestland.