A Yak at the foot of Lake Nam Tso. Namtso is renowned as one of the most beautiful in the mountains Nyainqentanglha. The yak (Bos mutus or Bos grunniens) is a large bovid and woolly coat, native to the mountains of Central Asia and the Himalayas, lives on the steppe and cold desert plateau of Tibet, Pamir and Karakoram, between 4000 and 6000 meters, which is found in both wild and domestic.