Zavkhan

The Zavkhan River rises in the Khangai Mountains and flows west across Mongolia towards Khyargas Lake. Its long course drains a wide area between the highlands and the arid basins of the Great Lakes Depression. The river appears in the history of the Mongol Empire: the Jami' al-Tawarikh places Ürüng Tash, a son of Möngke Khan, at a river called the Zavkhan Mörön.