The Yamdrok, Tibetan Yamzhog Yumco or Yamdrok Yumtso, is located at an altitude of 4,440 meters. It belongs to the sacred lakes of Tibet, according to faith, it is the appearance of a goddess. The lake has an area of about 640 km². An impressive view over the lake is from Kampa La.
The lake is fed by the wild streams of the surrounding mountains up to 7,000 m, with only a natural drain. This has changed since 1985. However, the water of the lake is partly used for energy production in a pumped storage facility.
Its extent is from east to west about 130 kilometers, from north to south about 70 kilometers. The shore of the lake is heavily dissected, and there are about a dozen islands in the lake. The largest has an area of about 3000 square meters. The Yamdrok Tso freezes in winter. The name of the lake means Green Jade Lake of the upper Alm.