Lugu Lake (Chinese: 泸沽湖; Pinyin: Lúgū Hú) is located in the North West Yunnan plateau in the centre of Ningliang Yi Autonomous County in the People's Republic of China. The middle of the lake forms the border between the Ninglang County of Yunnan Province and the Yanyuan County of Sichuan province. The formation of the lake is thought to have occurred in a geological fault belonging to the geological age of the Late Cenozoic. It is an alpine lake at an elevation of 2,685 metres (8,809 ft) and is the highest lake in the Yunnan Province.