Tanggula Shankou, Mountain pass in Tibet, China

Tanggula Shankou is a wide mountain pass over 5,000 meters high in the Tanggula Mountains, on the border between the Tibet Autonomous Region and Qinghai province. The Qinghai–Tibet Highway crosses it at 5,231 meters, its highest point, at 32°52′24″N 91°55′03″E. The Qinghai–Tibet Railway crosses 28 kilometers to the west-northwest, reaching 5,072 meters.

The pass gained modern transportation infrastructure when the Qinghai-Tibet Railway was constructed through it in 2006, establishing a rail link across the high plateau. This railway created new connectivity that transformed how people and goods move through the region.

The pass marks the boundary between the Tibet Autonomous Region and Qinghai province, and the Tanggula Mountains there form part of the watershed between the Yangtze River system to the north and endorheic basins draining internally to the south. Tibetan speakers know the pass as Ganda La, written གདང་ལ.

Visitors should prepare for extreme altitude and allow time for acclimatization to the thin air. The best time to travel through is during warmer months when conditions are more stable.

The Tanggula railway station, about 1 km from the rail summit, stands at 5,068 m, 255 m higher than Peru's Ticlio and the highest station in the world. The railway's summit itself, reached on 24 August 2005, lies 28 km west-northwest of the highway pass and tops out at 5,072 m.