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Quick answers

Helambu trek health and safety: altitude, cold, leeches and insurance

2 min readUpdated 2 Nov 2026By the Base Camp Hikes trek team

The short version: three of the most asked questions, answered in a line each. The rest of the page goes into detail.

  • How should I pace the first day? Walk at a pace at which you can hold a conversation, take a short rest break every hour and drink water often.
  • How cold does the night at Tharepati get? Tharepati is the coldest night of the trek, and Kutumsang is cold in winter too.
  • Does my travel insurance need to cover a certain altitude? Make sure your policy covers trekking up to at least 4,000 m, which comfortably includes Tharepati at about 3,690 m.

Is altitude sickness a concern on Helambu?

It is mild. The highest point, Tharepati, is at about 3,690 m, and serious altitude illness is rare, but some people get a headache there. Climb at a steady pace and drink water. If you feel unwell, descend toward Tarke Ghyang instead of staying high.

Which days are the hardest on the trail?

The first and third days. The climb out of Sundarijal is steep and can be hot in the afternoon, and day three climbs steadily to Tharepati. The rest of the route is mostly rolling or downhill, so keep your energy for those two days.

How should I pace the first day?

Walk at a pace at which you can hold a conversation, take a short rest break every hour and drink water often. Many beginners start too fast on the Sundarijal climb. A porter to carry your bag lets you walk with only a light day pack.

How cold does the night at Tharepati get?

Tharepati is the coldest night of the trek, and Kutumsang is cold in winter too. Bring a warm sleeping bag, a warm jacket and a hat. In winter, pack a heavy down jacket and gloves, and expect a chance of snow around the saddle.

Does my travel insurance need to cover a certain altitude?

Make sure your policy covers trekking up to at least 4,000 m, which comfortably includes Tharepati at about 3,690 m. Also check it includes emergency evacuation, and keep your policy details with your passport, where your guide or lodge owner can find them quickly.

How do I deal with leeches in the monsoon?

Leeches are common in the forest from June to September. Wear leech socks, tuck trousers into them, and carry a good rain jacket. Check your legs at each rest stop and flick leeches off rather than pulling hard. Many people avoid the monsoon for this reason.

Do I need a guide for Helambu?

A guide is not required, but it is helpful for first-time trekkers, adding knowledge and safety. Both guides and porters are affordable on this route. If you walk without one, tell your lodge where you are going, and keep your phone charged.

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