Sergelen, DornodSergelen is a sum of Dornod Province in eastern Mongolia. In 2009, its population was 2,198.HistoryKhogne District, founded in 1931, and Kherlenbayan District, founded in 1946, were merged in 1961 to form Sergelen District, centered on the slopes of Sergelen Kharat Mountain.Administrative divisionsThe district is divided into five bags, which are: Arkhooloi Barchin Bayan Galiin gol Ochir khureeTourist attractions Yakhi Lake