Namtso was born in the Paleogene age, as a result of Himalayan tectonic plate movements. The lake lies at an elevation of 4,718 m (15,479 ft), and has a surface area of 1,920 km2 (740 sq mi). This salt lake is the largest lake in the Tibet Autonomous Region. However, it is not the largest lake on the Qinghai-Tibet Plateau. That title belongs to Qinghai Lake (more than twice the size of Namtso); which lies more than 1,000 km (620 mi) to the north-east in Qinghai.Namtso has five uninhabited islands of reasonable size, in addition to one or two rocky outcrops. The islands have been used for spiritual retreat by pilgrims who walk over the lake's frozen surface at the end of winter, carrying their food with them. They spend the summer there, unable to return to shore again until the water freezes the following winter. This practice is no longer permitted by Chinese authorities.

Namtso Lake

　　The largest of the islands is in the northwest corner of the lake, and is about 2,100 m (6,900 ft) long and 800 m (2,600 ft) wide, rising to just over 100 m (330 ft) in the middle. At its closest point it is about 3.1 km (1.9 mi) from the shore.

　　The most remote island is, at its closest, 5.1 km (3.2 mi) from the shore. At summer time birds like Ruddy shelduck and cormorants (Phalacrocorax sp.) migrate to the lake area, besides the fields of Astragalus, Roegneria nutans and Marram grass.

　　The weather at Namtso is subject to abrupt, sudden change and snowstorms are very common across the Nyainqêntanglha range.

　　Other FeaturesNamtso is renowned as one of the most beautiful places in the Nyainqêntanglha mountain range. Its cave hermitages have for centuries been the destination of Tibetan pilgrims. A surfaced road across Laken Pass at 5186 m was completed to the lake in 2005, enabling easy access from Lhasa and the development of tourism at the lake.

　　Na genla mountain besides the lake, elevation 5190 meter

　　A Yak (friend of the locals and fashion model for tourists)Settlements in the area include Dobjoi, Donggar and Cha'gyungoinba.

Namtso Lake

　　The Tashi Dor monastery is located at the southeastern corner of the lake.

　　Around the area's natural elements, historical and anthropological background, a 2010 romantic drama Shangri-La, starring China's popular actor Hu Ge, was broadcast at CCTV1 and received positive reviews. Some scenes in the 2002 Hong Kong film The Touch were filmed at the lake.