Tanggula Mountain. Photo: china.org.cn

The Tanggula Pass in Tibet is a mountain pass that rises to 5,072 m (16,640 ft) above sea level.

On August 24, 2005, rail track was laid through the Tanggula Mountain Pass for the Qinghai-Tibet Railway, making the Tanggula Mountain Pass home to the highest railway in the world, surpassing the altitude of the highest Peruvian railway by 255 m (837 ft). The railway will connect Xining, Qinghai Province to Lhasa, Tibet Autonomous Region in the People's Republic of China.