The Baiyang River (Chinese: 白杨河; pinyin: Báiyáng hé; literally: "White Poplar River"), also known under a Mongolian name transcribed in Chinese as Namuguolei (Chinese: 纳木郭勒河; pinyin: Nàmùguōlēi hé), is a river in Xinjiang Uighur Autonomous Region of China. It flows through the region's Tacheng Prefecture and the Urho District of Karamay City. The river's total length is estimated at 170 kilometres (110 mi), and the average annual flow at 109 million cubic metres (88,000 acre·ft). The river's basin occupies 16,400 square kilometres (6,300 sq mi),
The Baiyang River starts in a massif near the junction of the Tarbagatai and Saur mountain ranges, near Xinjiang's border with Kazakhstan. It flows in a general southeastern direction, toward the endorheic Dzungarian Basin. Along much of its length it forms the border between Hoboksar Mongol Autonomous County in the east and Emin and Toli Counties in the west. It crosses Urho District of Karamay City, and then re-enters Hoboksar County.
The Baiyang River is dammed at 46°08′35″N 85°22′35″E / 46.14306°N 85.37639°E; the dam creates the Baiyang River Reservoir (白杨河水库) with an area of 5.8 square kilometres (2.2 sq mi).