The inhumane climb to Changlashan Pass with 37% ramps

Changlashan Pass is a high mountain pass at an elevation of 4.708m (15,446ft) above the sea level, located in Zadoi County, in the southwest of Qinghai Province, China, bordering the Tibet Autonomous Region to the south.

Changlashan Pass

The road to the summit, also known as Chang La Shan Pass, is totally unpaved. It’s very curvy with hundreds of turns and steep, brutally steep, hitting a 37% of maximum gradient through some of the ramps.
The pass is 13.8 km (8.57 miles) long, running from Shisu Station to Longmada. Due to its dangerous conditions, the road was bypassed by the paved S309 route from Yushu to Zadoi.
Road suggested by: Hugh Wilson