After the Goryeo Dynasty was established, it renamed Pyeongchang-hyeon. Then, it was under control of Wonju. When a 10-provincial system was enforced, the north of Pyeongchang region was involved in Sakbang-do, and the south of the region was involved in Jungwon-do. When a new administrative system was carried out by King Hyeonjong, the east of the region was involved in Dong-gyeo, and the rest of it was included in Yanggwang-do. An administrator for the region was sent from the central government, and it became independent of Wonju in 1299.