Eryuan West Lake (Chinese: 洱源西湖; pinyin: Ěryuán Xī Hú) or Dali West Lake (Chinese: 大理西湖; pinyin: Dàlĭ Xī Hú) is a plateau lake in western Yunnan province, China. It lies at the northern foot of the snow-covered Cangshan. It is drained from the southern end by the Luoshi River, which flows into the Erhai Lake. The lake is about 2.6 long from north to south and 0.8 to 2.2 km wide from east to west. The surface of the lake is about 1,968 metres above sea level.