Tanggula Mountains (also called Dangla Mountains) are a mountain range in Tibet. It is located on the Tibetan Plateau with its main ridge averaging more than 5,000 m. The Yangtze River originates in this mountain range and the Geladandong (at 6,621 metres) is the tallest peak in the range. A pass through these mountains, Tanggula Mountain Pass, is the highest railway in the world at 5,072 meters above sea level

The Tanggula (Tanglha) Range is a dividing range between the basin of the Yangtze River in the north and the endorheic basins of north-eastern Tibet in the south. This range should not be confused with the Nianqing Tangula, which is located a few hundreds of kilometers further south, separating those endorheic basins from the Yarlung Tsangpo River basin of southern Tibet.