Short answer
The main risks in Darjeeling and Sikkim are altitude at Tsomgo, Nathu La, Yumthang and Gurudongmar, monsoon landslides on narrow roads, floods on the Teesta and cold weather. Ascend gradually, drink water, travel early in the day, follow weather alerts and postpone if authorities advise it.
On this page 15 sections
- Altitude: where it matters
- Symptoms and what to do
- Reducing the risk
- The monsoon and landslides
- River and water safety
- Cold and weather
- Road safety
- Wildlife and nature
- Health and medicines
- Safety for solo and women travellers
- Emergency numbers and help
- Travel insurance
- A simple morning check
- Respect the place
- Plan with us
Darjeeling and Sikkim are beautiful, welcoming and generally safe regions, but they are also mountains. Altitude, landslides, floods and cold are real hazards, and most problems can be avoided with planning and humility. This guide explains the main risks and what to do about them. It is general information, not medical advice. Please talk to your own doctor.
Altitude: where it matters
Darjeeling (2,050 m), Gangtok (1,650 m), Kalimpong (1,250 m) and Pelling (2,000 m) are low enough that most people feel fine. The higher places are different:
- Tsomgo Lake: near 3,800 metres.
- Nathu La: above 4,300 metres.
- Lachung: about 2,700 metres, and Lachen: about 2,750.
- Yumthang Valley: about 3,500 metres.
- Zero Point: about 4,700 metres.
- Gurudongmar Lake: above 5,400 metres.
At these heights, the air has a third to a half less oxygen than at sea level. Altitude sickness can affect anyone, regardless of fitness.
Symptoms and what to do
Mild symptoms include headache, nausea, dizziness, unusual tiredness and trouble sleeping. Rest, drink water and do not climb higher. If symptoms are moderate, descend. Seek urgent medical help and descend immediately if you notice confusion, loss of balance, severe breathlessness at rest, a persistent wet cough, blue lips or vomiting that does not stop. These can signal serious altitude illness, which can be fatal.
Reducing the risk
- Ascend gradually. Spend a night in Gangtok or Lachung before going higher.
- Drink three to four litres of water a day, and avoid alcohol and smoking.
- Eat light, carbohydrate-rich meals.
- Keep time at the highest points short, particularly at Gurudongmar and Nathu La.
- Avoid exertion.
- Talk to your doctor before travelling if you have heart, lung or blood-pressure conditions, are pregnant, or travel with young children or elders.
The monsoon and landslides
The monsoon, from June to September, is the main danger period. Heavy and prolonged rain loosens steep slopes, and roads are blocked or washed away. Flash floods and debris flows can follow. In October 2023, a glacial lake outburst flood caused major destruction along the Teesta, and in 2025 landslides stranded tourists in North Sikkim.
If you must travel in the monsoon:
- Stay in towns such as Darjeeling, Kalimpong and Gangtok, and avoid North Sikkim.
- Leave early in the day, because rain builds in the afternoon.
- Avoid night driving.
- Keep a flexible schedule and a spare day.
- Follow weather and district alerts.
- Never cross flooded roads or streams.
- Avoid stopping below steep slopes, on bends or near rivers.
When to postpone: if authorities issue an alert for your route, or if the road you need is blocked, delay your journey. A day's patience is better than a risky drive.
River and water safety
The Teesta and Rangit rivers are powerful and cold. Rafting is offered in some stretches and seasons; use licensed operators with life jackets and trained guides, and avoid rafting in high water. Do not swim in rivers after rain. Keep away from riverbanks during storms.
Cold and weather
Temperatures fall sharply at night and at altitude. Hypothermia is possible in winter, in rain and wind. Wear layers, keep dry, eat and drink regularly, and carry spare clothes. Frostbite is a risk at the highest places in winter. UV is strong at altitude, so use sunscreen and sunglasses.
Road safety
Hill roads are narrow, with steep drops and hairpin bends. Use experienced drivers, avoid speed and overtaking, and take breaks. Take motion-sickness tablets in advance. Wear seat belts. Avoid driving at night and in fog. Do not pressure drivers to rush.
Wildlife and nature
Sikkim and Darjeeling host red pandas, leopards, bears and many birds, but sightings are rare. Do not feed monkeys and keep food out of sight. Stay on marked trails, particularly in sanctuaries such as the Shingba Rhododendron Sanctuary. Do not pick flowers.
Health and medicines
Carry basic medicines: painkillers, anti-nausea tablets, rehydration salts, antacids, antihistamines, bandages and any prescriptions. Pharmacies are available in towns but not in remote areas. Drink safe water and take care with food.
Safety for solo and women travellers
Darjeeling, Gangtok, Kalimpong and Pelling are popular with solo travellers. Take normal precautions: choose well-reviewed stays, avoid isolated places at night, share your plans and use trusted transport. Remote roads and weather are bigger risks than towns. We can arrange vetted stays and drivers.
Emergency numbers and help
The national emergency number is 112. The ambulance number is 108 in many areas. Save your hotel's number, your driver's number and local police contacts. In remote areas where mobile coverage fails, tell your driver or guide about any problem early.
Travel insurance
Buy insurance that covers medical care, trip cancellation and evacuation, including for high-altitude excursions. Read the terms, because some policies exclude certain activities or heights.
A simple morning check
Each morning at altitude, ask yourself a few questions. How did I sleep? Do I have a headache, and does it ease with water and a painkiller? Is my appetite normal? Do I feel unusually breathless or dizzy? If you travel in a group, ask each other. If the answers are bad, delay your ascent by a day, rest and drink water. Most altitude problems improve with a day of rest at the same height, and nearly all improve with descent. Your plan should always be flexible enough to allow this, and ours is.
Respect the place
Sikkim bans many single-use plastics, so carry a reusable bottle. Do not litter, particularly near lakes. Dress modestly at monasteries, and ask before photographing people. Support local businesses.
Plan with us
Our plans include buffer days and flexible options. See the first-time visitor guide, or send us your dates and any health notes and we will plan around them.
Practical tips
- Spend at least a night at moderate altitude before going to Tsomgo, Nathu La or Lachung.
- Drink plenty of water, avoid alcohol before high places and descend if symptoms worsen.
- Check weather and road alerts before every long journey in the monsoon.
- Postpone if heavy rain or an official alert covers your route.
- Buy travel insurance that covers medical care and evacuation.
