The Lang Mountains or Lang Shan (Chinese: 狼山; pinyin: Láng Shān; literally: "Wolf Mountains"; Mongolian: Khara Narin Ula) is a mountain range at the northwest corner of the Ordos Loop in Inner Mongolia, China. It runs from southwest to northeast and forces the Yellow River to turn from north to east. To the northwest is desert and to the southeast, between it and the Yellow River, is an irrigated area.