Why altitude matters in Ladakh
Leh sits at about 3,500 m. At that height each breath carries roughly a third less oxygen than at sea level, and almost every visitor arrives by air from Delhi, at 216 m, in about 75 minutes. The body has no time to adjust on the way. That is the single most important fact in planning a trip to Ladakh, and it shapes every itinerary we design.
Most people feel the altitude on the first day: a mild headache, breathlessness on stairs, a racing heart at night and poor sleep. These are normal and usually fade within 48 hours if you rest. Problems begin when travellers treat the first day like any other holiday, walking the bazaar, climbing to Shanti Stupa or driving over Khardung La. A few people develop acute mountain sickness, and a very small number develop dangerous forms of altitude illness that need immediate descent and treatment.
Altitude affects people unpredictably. Age, fitness and previous experience are poor guides; a marathon runner can struggle while a grandparent feels fine. What does make a difference is the speed of ascent. Travellers who drive in from Manali or Srinagar over two days arrive partly adjusted, while those who fly in must allow the body to catch up on the ground. Either way, the first two days set the tone for the whole trip.
The 48-hour rule in Leh
On the day you land, do nothing. Go straight to your hotel, eat a light lunch, sleep in the afternoon and drink water or herbal tea steadily. Avoid alcohol, long hot showers and climbing stairs fast. On the second day, keep to gentle activity: a slow walk through the old town or a short drive to Shey, with plenty of rest. By the third day, most guests feel ready for Thiksey at dawn and Hemis.
We plan at least three nights in Leh before any high pass or high lake, and four before Hanle or Tso Moriri. This is not caution for its own sake. Khardung La and Chang La are both above 5,300 m, and Pangong, Hanle and Tso Moriri lie between 4,225 m and 4,522 m. Giving your body time at 3,500 m first is what makes those places enjoyable rather than miserable.
- Day 1: rest completely, light meals, 3–4 litres of fluid
- Day 2: gentle walking, short drives, early night
- Day 3: monasteries near Leh, still no high passes
- Day 4 onwards: high passes and lower valleys such as Nubra
- After 4–5 nights: high lakes and Hanle
Know the warning signs
Acute mountain sickness, or AMS, feels like a bad hangover: headache with nausea, loss of appetite, tiredness, dizziness or poor sleep. Mild AMS usually improves with rest, fluids and simple pain relief, and by not going higher. If it gets worse despite rest, you must descend.
Two rarer conditions are emergencies. High-altitude pulmonary oedema, HAPE, is fluid on the lungs: breathlessness at rest, a persistent cough, sometimes with frothy or pink sputum, and great fatigue. High-altitude cerebral oedema, HACE, is swelling of the brain: confusion, clumsiness, severe headache, unusual behaviour or drowsiness. Both need oxygen, medical help and descent without delay. They are uncommon among travellers who acclimatise properly, but everyone in your party should know the signs.
| Condition | Main signs | What to do |
|---|---|---|
| Normal adjustment | Mild breathlessness on effort, light headache, disturbed sleep | Rest, fluids, no alcohol, do not go higher yet |
| Mild AMS | Headache with nausea, poor appetite, tiredness, dizziness | Rest at the same height, fluids, simple pain relief; descend if worse |
| HAPE | Breathless at rest, cough, chest tightness, extreme fatigue | Emergency: oxygen, descend, see a doctor at once |
| HACE | Confusion, loss of balance, severe headache, drowsiness | Emergency: oxygen, descend, see a doctor at once |
Medicines and what to ask your doctor
Acetazolamide, often sold as Diamox, helps many people acclimatise faster and is widely prescribed for travel to Ladakh. It is a prescription medicine with side effects, including tingling in the fingers and more frequent urination, and it is not suitable for everyone, for example some people with sulfa allergies. Ask your own doctor whether it suits you, what dose to take and when to start.
Bring paracetamol or ibuprofen for headaches, rehydration salts, lip balm and high-factor sunscreen. If you have any heart, lung or blood pressure condition, or are pregnant, see your doctor before booking. Travel insurance must cover trekking or travel at altitudes up to at least 5,400 m, because the road passes reach that height.
Some travellers ask about herbal remedies, garlic soup or special teas sold in Leh. They are harmless in moderation but no substitute for rest, fluids and a slow ascent. Bring any regular medicines in your hand luggage with a copy of the prescription, as pharmacies in Leh stock common drugs but not everything. On winter trips, keep medicines that must not freeze close to your body.
A ladder of altitudes
A good rule is to sleep progressively higher, not to jump. The table below shows the main sleeping places in Ladakh and the passes you cross, in order of height. Nubra and the lower Indus are actually lower than Leh, which makes them good early stops. The high lakes and Hanle belong late in a trip.
| Place | Altitude | When to sleep here |
|---|---|---|
| Turtuk | ≈ 2,900 m | Any time after Leh |
| Alchi, Nimmu | ≈ 3,100 m | From day 1 or 2 |
| Nubra (Diskit, Hunder) | ≈ 3,100 m | After 2–3 nights in Leh |
| Leh | ≈ 3,500 m | On arrival, with 48 hours' rest |
| Padum, Zanskar | ≈ 3,657 m | After 3+ nights in Leh |
| Pangong Tso | ≈ 4,225 m | After 3+ nights in Leh or Nubra |
| Hanle | ≈ 4,300 m | After 4+ nights in Ladakh |
| Tso Moriri | ≈ 4,522 m | After 4–5+ nights in Ladakh |
| Khardung La, Chang La (passes) | ≈ 5,360 m | Cross only; stop 15–20 minutes |
What we carry and how we monitor
Every vehicle on our journeys carries a medical oxygen cylinder, a pulse oximeter and a first-aid kit. Your guide checks on everyone each morning and evening, and asks simple questions about sleep, appetite and headache. Oxygen saturation in Leh is often around 88–93 per cent at rest for acclimatising visitors, lower at the lakes; the trend matters more than a single reading.
Our drivers know where the nearest medical help is on each route, and Leh has a well-equipped hospital. If a guest is unwell, we change the plan: an extra rest day, skipping a high night, or driving down. This flexibility is the main reason we leave a spare night in Leh at the end of most journeys.
On high nights at Pangong, Hanle and Tso Moriri, we choose camps and homestays that keep their own oxygen, and we brief the staff about any guest who has felt unwell earlier in the trip. If a night at the lakes looks unwise, we can swap it for a lower stay and visit the lake by day instead. Guests never need to feel they are letting the group down by asking to go lower.
Sleep, cold and dehydration
Many visitors are surprised that sleep, not walking, is the hardest part of the first nights. At altitude, breathing becomes irregular during sleep, with short pauses followed by deep breaths, which can wake you with a start. This is common and usually settles after a few nights. Sleeping with your head slightly raised, keeping the room cool but not cold, and avoiding heavy dinners all help.
The air in Ladakh is extremely dry, and you lose a great deal of water simply by breathing. Combined with strong sun and wind, this dehydrates you faster than you notice. Sip water through the day rather than drinking large amounts at once, and add rehydration salts after long drives. Butter tea, soups and fruit all count towards your fluids. Coffee and black tea are fine in moderation.
Cold adds to the strain, particularly on winter trips and at the high lakes. Shivering burns energy and disturbs sleep, so dress in layers, wear a hat at night if needed and ask for extra blankets or a hot water bottle. A warm body acclimatises more comfortably than a cold one.
Simple habits that help
Drink often, eat carbohydrates, walk slowly and talk to your guide about how you feel. Sleep with a window slightly open if the room is warm and stuffy. Avoid sleeping pills, which can depress breathing at altitude. Do not smoke. Children and older travellers acclimatise like anyone else, but they may not describe symptoms clearly, so watch for unusual tiredness, irritability or poor appetite.
- Drink 3–4 litres a day; urine should be pale
- No alcohol for the first three nights
- Climb stairs and slopes slowly, pausing often
- Keep stops on high passes to 15–20 minutes
- Tell your guide about symptoms at once; never hide them
Questions travellers ask
Good to know
How long does it take to acclimatise in Leh?
Most visitors feel noticeably better after 48 hours of rest and are ready for gentle sightseeing on day three. Full acclimatisation to 3,500 m takes longer, which is why we plan three to four nights in Leh before high passes or lakes. Everyone adjusts at a different pace, regardless of fitness.
Should I take Diamox for Ladakh?
Many travellers take acetazolamide, sold as Diamox, to help acclimatisation, and many doctors prescribe it for Ladakh. It is a prescription medicine with side effects and is not right for everyone. Ask your own doctor whether to take it, what dose and when to start.
Does fitness protect against altitude sickness?
No. Fitness does not prevent altitude sickness, and fit people sometimes suffer more because they push too hard early. What helps is a slow ascent, rest on arrival, plenty of fluids and no alcohol. Fitness does make walking more enjoyable once you are acclimatised.
Is it safe to drive over Khardung La?
Yes, after two or three nights in Leh. You cross the pass rather than sleep on it, and Nubra on the far side is lower than Leh. Keep the stop at the top to 15–20 minutes and descend promptly if anyone feels unwell.
Can I sleep at Pangong after one night in Leh?
We strongly advise against it. Pangong is at 4,225 m, and sleeping there after one night at 3,500 m raises the risk of acute mountain sickness. Plan at least three nights in Leh or a combination of Leh and Nubra first.
What should I do if I get a headache in Leh?
Rest, drink water, take simple pain relief and avoid alcohol. A mild headache on day one is common. If it worsens, comes with vomiting or does not improve with rest, tell your guide; we will check your oxygen levels and arrange a doctor if needed.
Do hotels in Ladakh have oxygen?
Good hotels in Leh and most camps at the lakes keep oxygen cylinders for guests. Our vehicles also carry oxygen and a pulse oximeter. Oxygen relieves symptoms but does not replace descent if a serious condition develops. Ask staff at check-in.
Are children more at risk of altitude sickness?
Children acclimatise much like adults but may not describe symptoms well. Watch for unusual tiredness, poor appetite, vomiting or irritability. Many doctors advise caution with very young children at Ladakh's altitudes. Speak to your paediatrician before travel. Plan a gentle itinerary.
Is flying or driving into Ladakh better for acclimatisation?
Driving in from Srinagar or Manali over two days lets the body adjust gradually, which helps acclimatisation. Flying is quicker but lands you at 3,500 m at once, so the 48-hour rest in Leh is essential. Both work if planned well.
