Shey-Phoksundo National Park is situated in he mountain region of Western Nepal, covering parts of Dolpa and Mugu Districts. Gazetted in 1984, it is the largest national park in the country with an area of 3555 sq. km. The main objectives of the park are to preserve the unique trans.- Himalayan ecosystem with its typical Tibetan type of flora and fauna, and to protect endangered species such as the snow leopard and musk deer.
Much of the park lies north of the Great Himalayan Range. Kanjiroba Himal lies at the southern edge of the trans.-Himalayan region of the Tibetan plateau. The high Dolpa plateau in the north-east of the park is drained by the Langu (Namlang) River. The southern catchment of the park is drained by the Jugdula and Suligad Rivers, which flow south and drain into the Bheri River. Nepal's second largest lake, Phoksundo, lies at 3660 m. in the upper reaches of Suligad.