Namtso is a large saline lake on the Tibetan Plateau north of Lhasa, lying at about 4,718 metres beneath the glaciated Nyenchen Tanglha range. Covering some 2,000 square kilometres, it is one of the largest lakes in Tibet and one of its three holy lakes; Tibetans call it the “heavenly lake” and walk a pilgrimage circuit around it.
Key facts
Overview
The lake lies in a closed basin on the boundary between Lhasa's Damxung county and Nagqu, separated from the Lhasa valley by the Nyenchen Tanglha mountains, whose main summit rises to 7,162 metres on the south-eastern shore. Its water, a vivid blue under the clear plateau sky, is brackish, and the shores are grassland used by nomadic herders for their yaks, sheep and goats.
The Tibetan name, Gnam mtsho, means “heavenly lake”; the Mongolian name Tengri Nor has the same meaning. In Tibetan belief the lake goddess Dorje Gongdzama is the consort of the mountain god Nyenchen Tanglha, and the pair are among the most important protector deities of central Tibet.
How the landscape formed
Namtso occupies a tectonic basin formed as the Nyenchen Tanglha range was uplifted along a major fault. With no outlet, the lake loses water only by evaporation, which has made it slightly saline. Old shorelines and terraces high above the present water level record a much larger lake in wetter periods of the late Pleistocene and early Holocene. In recent decades glacier meltwater and increased precipitation have caused the lake level to rise, a change monitored by the Chinese Academy of Sciences research station on its shore.
Highlights
Nyenchen Tanglha
念青唐古拉峰
The 7,162 m peak on the south-eastern shore, abode of the mountain god who is the lake's consort.
Tashi Dor peninsula
扎西半岛
A limestone peninsula on the eastern shore with caves once used by hermits, a small monastery, mani stones and prayer flags.
Largen La pass
那根拉山口
The pass of about 5,190 m on the road over the Nyenchen Tanglha, with the first view of the lake.
Welcome rocks
迎宾石
Two tall rock pillars at the entrance to the Tashi Dor peninsula, draped with prayer flags.
Plants and wildlife
The lake is surrounded by high, cold alpine meadow and steppe. It is an important summer breeding ground for waterbirds of the plateau, and herds of wild and domestic grazing animals share the grasslands along its shores.
Plants
Kobresia meadow
高山嵩草
The low sedge turf that covers much of the plateau and supports the herders' animals.
Wildlife
Bar-headed goose
斑头雁
Breeds on the lake and its islands in summer.
Brown-headed gull
棕头鸥
A plateau gull common around the Tashi Dor peninsula in summer.
Tibetan gazelle
藏原羚
A small gazelle of the grasslands north of the lake.
Culture and legend
Namtso is one of the three holy lakes of Tibet, with Yamdrok and Manasarovar. Pilgrims walk around the lake, a journey of many days, and the Year of the Sheep in the Tibetan calendar, associated with the lake, brings especially large numbers. The caves of the Tashi Dor peninsula were used for retreats by meditators, and Tibetan tradition names the peninsula among the places where Padmasambhava and later masters meditated.
Tashi Dor Monastery
扎西寺
A small monastery built into the rock of the peninsula.
Mani stones
玛尼堆
Piles of stones carved with the mantra Om mani padme hum, left by pilgrims along the shore.
History
Late Pleistocene
A larger lake
Raised shorelines show that the lake once stood many tens of metres higher than today.
Late 19th century
Survey of India explorers
Indian pundits travelling in secret for the Survey of India, among them Nain Singh, reached and described the lake.
2005
Research station founded
The Chinese Academy of Sciences established a multidisciplinary observation station on the south-eastern shore to study lake, climate and glaciers.
Through the seasons
Spring
Ice breaks up in May; wind is strong and snow still common on the passes.
Summer
June to September is the main season, with green pastures, nomad camps, nesting birds and the mildest weather, though afternoon storms are frequent.
Autumn
Clear skies and very blue water in September and October; nights are freezing.
Winter
The lake freezes over and the road over Largen La is often blocked by snow.
Routes and ways in
Road from Damxung
A road from the Lhasa–Nagqu highway crosses the Largen La to the Tashi Dor peninsula.
Tashi Dor peninsula walk
Paths lead around the peninsula past the caves, rock pillars and mani walls, with views across to Nyenchen Tanglha; a circuit takes one to two hours.
Namtso kora
The full pilgrimage around the lake is a journey of several weeks on foot, undertaken by Tibetan pilgrims and rarely by visitors.
Practical notes
- The lake lies about 1,000 m higher than Lhasa; visitors should acclimatise for several days in Lhasa first, and many feel the altitude badly if they stay the night.
- Foreign visitors need a Tibet Travel Permit, arranged through a registered travel agency with a guided itinerary; see the visa section for general entry rules.
- Walk clockwise around shrines and mani walls, do not swim in the holy lake, and ask before photographing pilgrims.
- Sun and wind are intense; sun protection and warm clothing are needed even in summer.
Cities to start from
Frequently asked questions
Sources
- Nam Lake — Encyclopaedia Britannica (retrieved 27 September 2026)
- Nam Co Station for Multisphere Observation and Research — Institute of Tibetan Plateau Research, Chinese Academy of Sciences (retrieved 27 September 2026)
- People's Government of the Tibet Autonomous Region — People's Government of the Tibet Autonomous Region (retrieved 27 September 2026)
More mountains and nature in Tibet
- Mountain · 8,848.86 mMount Everest (Qomolangma)珠穆朗玛峰The highest mountain on Earth, seen from its northern side
- Sacred mountainMount Kailash (Kang Rinpoche)冈仁波齐The sacred mountain of four religions in western Tibet
- Lake · 4,441 mYamdrok Lake羊卓雍错The turquoise, scorpion-shaped holy lake south of Lhasa
- Gorge · 7,782 mYarlung Tsangpo Grand Canyon雅鲁藏布大峡谷The great bend of the Yarlung Tsangpo around Namcha Barwa
- Sacred mountain · 6,740 mMeili Snow Mountains (Kawagebo)梅里雪山Kawagebo, Yunnan's highest and unclimbed sacred peak
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