The short answer
Imja Tsho is a glacial lake below Island Peak that grew quickly as the glacier retreated, and has been studied for flood risk. It is reached by a day walk from Chukhung and is a striking sight rather than a hazard to trekkers.
Key facts
- Altitude
- About 5,000 m
- From Chukhung
- Day hike
- Topic
- Glacial lake risk
- Views
- Island Peak, Lhotse
How it works
- Base in ChukhungSleep a night before the hike.
- Walk up the valleyGentle slopes lead to the moraine.
- Climb the ridgeLook down on the lake.
- Take photosIsland Peak makes a good backdrop.
- Return to ChukhungBefore afternoon weather changes.
A lake shaped by climate
Imja Tsho lies below Island Peak and has grown as glacier ice has melted. It is often described as a glacial lake that scientists and local authorities monitor for risk.
Visiting it is possible on side trips from Chukhung, usually as part of an acclimatisation day.
Why it matters
Glacial lakes show how a changing climate affects mountain communities. Efforts to reduce risk have included engineering and monitoring, though details change over time.
Treat information about lake size and risk as approximate and check current sources. Ask us if you want to include it in your itinerary.
Insider tip
Go with a guide; moraine slopes are loose.
Avoid this
Do not camp or linger below unstable moraine walls.
Related questions
Is Imja Tsho dangerous?
It has been monitored and mitigated; trekkers should simply follow guides.
Can I swim?
No. The water is freezing and at altitude.
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