Parth9114, via Wikimedia Commons (CC BY-SA 4.0)
Tsomgo Lake
A glacial lake at about 3,780 metres on the old Silk Route to Tibet, frozen from December into spring — and it needs a permit that only a registered agent can obtain.
A high lake on the road to the frontier
Tsomgo — also written Changu — lies about forty kilometres east of Gangtok on the old Silk Route toward Nathu La and the Tibetan frontier, at roughly 3,780 metres. It is a glacial lake in a bowl below the pass, fed by snowmelt, and it freezes from December into early spring. The rest of the year the shore is hung with prayer flags and yaks are worked along it for photographs. It is not in Gangtok — it is a day excursion from the city, and every Sikkim itinerary treats it as such. Because the road runs toward a sensitive border, a protected-area permit is required and it cannot be obtained independently: a registered travel agent must apply, and identity documents and photographs are needed. Baba Mandir, further along the same road, is a shrine to Harbhajan Singh, a soldier who died nearby in 1968.
Explore Tsomgo Lake on the map
City locations, drawn from our published destination data. Attractions, hotels and restaurants are not mapped yet.
What to look at
The lake, the road to it, and the altitude.
🏔️ The lake
- A glacial bowl below the pass, frozen from December into early spring and open water the rest of the year
🚩 The shore
- Prayer flags along the water, and a small Shiva temple on the bank
🛕 Baba Mandir
- Further along the same road, a shrine to a soldier who died near here in 1968 and is still held to keep watch
🛣️ The road itself
- The old Silk Route climbing toward Nathu La, and one of the reasons the day is worth it
Getting there
The permit is the part that needs planning.
📄 The permit
- A protected-area permit is required and must be applied for by a registered agent — it cannot be obtained by an individual on the day
- Identity documents and passport photographs are needed; foreign nationals face additional conditions
🚗 By road
- About forty kilometres and two hours each way from Gangtok, climbing steeply throughout
⛔ Closures
- Snow and landslip close the road at short notice, most often in winter and in the monsoon
When to go
Early, and with the day after it kept light.
🕰️ Time of day
- An early start — the road is slow, cloud builds through the day and permits are checked at a fixed post
📅 Season
- Frozen and snowbound December into spring, which is its own reason to go
- Late spring brings rhododendron along the road; the monsoon brings slips
⏱️ How long
- Half a day at least, and most of a day with Baba Mandir added
Worth knowing
Altitude and paperwork, in that order, and neither is a formality.
🏔️ Altitude is the real issue
- Gangtok is at 1,650 m and the lake is at about 3,780. That is a fast gain and some visitors feel it
- Several itineraries schedule this day first deliberately, as acclimatisation before going higher
📄 Permits are not optional
- No permit, no access. It must be arranged in advance through a registered agent
🐂 The yaks
- Worked at the roadside for photographs, and the arrangement is a paid one — agree it first
🧥 Cold
- Well below freezing in winter and cold in any season. There is very little shelter at the lake
Nearby
Gangtok and east Sikkim.
Frequently asked
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