The Kunlun Mountains (Mongolian: Хөндлөн Уулс) is one of the longest mountain chains in Asia, extending more than 3,000 km.
The Kunlun runs eastwards along the northern part of the Tibetan plateau to form the border range of northern Tibet. It stretches along the southern edge of what is now called the Tarim Basin, the infamous Takla Makan or "sand-buried houses" desert, and the Gobi desert. A number of important rivers flow from it including the Karakash River ('Black Jade River') and the Yurungkash River ('White Jade River'), which flow through the Khotan Oasis into the Taklamakan Desert.
The highest mountain of the Kunlun Shan is the Kunlun Goddess (7,167 m) in the Keriya area. The Arka Tagh is in the centre of the Kunlun Shan; its highest point is Ulugh Muztagh (6,973 m, definitely not 7,723 m). Some authorities claim that the Kunlun extends north westwards as far as Kongur Tagh (7,649 m) and the famous Muztagh Ata (7,546 m). But these mountains are physically much more closely linked to the Pamir group (ancient Mount Imeon).
Bayan Har Mountains, a southern branch of the Kunlun Mountains, forms the watershed between the catchment basins of China's two longest rivers, the Yangtze River and the Huang He.
The mountain range formed at the northern edges of the Cimmerian Plate during its collision, in the Late Triassic, with Siberia, which resulted in the closing of the Paleo-Tethys Ocean.