Kunlun Mountains, also Kunlun Shan or K’un-lun Shan, major mountain system, western China. The mountains rise to 7,723 m (25,338 ft) atop Muztag (Mu-tzu-t'a-Ko) and extend east to west for more than 2410 km (1500 mi) between the northern edge of the Tibetan Plateau (Qing Zang Gaoyuan) and the two arid basins, the Tarim Pendi and the Qaidam Pendi. The Altun (A-erh-chin) Shan, a range that encircles the Qaidam Pendi, is sometimes defined as part of the Kunlun system. India claims territory in the western Kunlun Mountains.