The Nyenchen Tanglha Mountains are a 700-kilometre (430 mi) long mountain range, and subrange of the Transhimalaya System, located in Tibet and the Tibet Autonomous Region of China.

The Trans himalaya, or "Gangdise – Nyenchen Tanglha range", is a 1,600-kilometre-long (990 mi) mountain range in China, India and Nepal, extending in a west–east direction parallel to the main Himalayan range. Located north of Yarlung Tsangpo river on the southern edge of the Tibetan Plateau, the Transhimalaya is composed of the Gangdise range to the west and the Nyenchen Tanglha range to the east.