Tilicho Lake is a lake located in the Manang district of Nepal. It is situated at an altitude of 4,919 metres (16,138 ft) in the Annapurna range of the Himalayas.[1] Another source lists the altitude of Lake Tilicho as being 4,949 metres (16,237 ft). Mountain lakes are known to geographers as tarns if they are caused by glacial activity. Tarns are found mostly in the upper reaches of the Himalaya, above 5,500 metres (18,000 ft).