The Khilok (; ,Secret History of the Mongols paragraph 109O.Bavuu, "Historic lands mentioned in the Secret History of the Mongols, 2005 ) is a river in Eastern Siberia, a right tributary of the Selenga. The length of the river is and its watershed is . There are a few settlements on its banks: Khilok, Bada etc.

Arakhley Lake belongs to the Khilok river basin.Энциклопедия Забайкалья - Арахлей, озеро

See also List of rivers of Russia

See also Selenga Highlands List of rivers of Russia

References