- Where
- Thangu, about 30 km above Lachen
- Altitude
- About 3,900 m
- Distance
- About 30 km from Lachen; about 35 km before Gurudongmar Lake
- Timings
- Early morning on the Gurudongmar day
- Entry fee
- Free
- Permit
- North Sikkim permit needed
- Best time
- April–June for rhododendrons; October–December for clear skies
- Time needed
- 30–45 minutes
Thangu is the last settlement on the road from Lachen to Gurudongmar Lake, set in a broad valley at about 3,900 m. Most travellers stop here before dawn for tea, breakfast and a short walk to adjust to the altitude before driving on to the lake.
What to expect
In April to June the slopes are covered in rhododendrons; from December the valley is snowbound. Temperatures are below freezing on most mornings outside summer. Carry warm layers, drink water and keep exertion low.
How to reach
Thangu is about 30 km above Lachen. Trips leave Lachen around 4–5 am for Gurudongmar and pass through Thangu. A North Sikkim permit, arranged in Gangtok by a registered operator, is required.
Thangu Valley: questions travellers ask
What is the altitude of Thangu?
About 3,900 m (around 12,800 ft).
Why do Gurudongmar trips stop at Thangu?
For breakfast and to adjust to the altitude before driving on to the lake at over 5,000 m.
Can I stay at Thangu?
Most visitors stay at Lachen and pass through Thangu on the Gurudongmar day.
When are the rhododendrons in bloom?
Usually April to June.
Sources
Timings and fees change. Check on the day, or ask us when you book.






