Lakes Hulun and Buir on the China-Mongolia Border49.0N 117.4E
Lake Hulun, also known as Dalai nuur, is located in Inner Mongolia, China, just south of the border with Russia and east of the border with Mongolia. It is one of the five largest freshwater lakes in all of China, covering approximately 2,339 km².
Flowing across the high steppes of Mongolia into China and Lake Hulun is the Kherlen or Kerülen River, which has a total length of 1,254 km. Located nearby, to the southeast of Lake Hulun, is the smaller Lake Buir. The lake is on the China-Mongolia border and surrounded by the Hulun Buir grasslands.