함경남도
Yodok camp was about northeast of Pyongyang. It was located in Yodok County, South Hamgyong Province, stretching into the valley of the Ipsok River, surrounded by mountains: Paek-san to the north, Modo-san to the northwest, Tok-san to the west, and Byeongpung-san to the south. The entrance to the valley is the Chaebong Pass to the east. The streams from the valleys of these mountains form the Ipsok River, which flows downstream into the Yonghung River and eventually into the sea near Wonsan city.