Altitude sickness in Ladakh and Spiti: what actually prevents it
More Ladakh trips are cut short by acute mountain sickness than by weather or roads. Almost all of them are preventable, and the prevention is boring: go slower.
Leh sits at 3,500 metres. Khardung La is 5,359 and Chang La 5,360. At those heights the air holds roughly half the oxygen it does at sea level, and your body needs days, not hours, to adjust. Acute mountain sickness is not a sign of being unfit — marathon runners get it and sixty-year-olds do not. It is almost entirely about how fast you gained the altitude.
What it feels like
Mild AMS is a headache that paracetamol does not fully clear, nausea, poor sleep and breathlessness on stairs. It usually starts six to twelve hours after arriving and affects a large minority of people who fly straight into Leh. It is unpleasant but not dangerous, and it resolves with rest.
What actually works
- 1Spend the first 24 to 36 hours in Leh doing nothing. Not a monastery, not a market — nothing. This single rule prevents more AMS than everything else combined.
- 2Do not sleep more than 500 metres higher than the previous night once you are above 3,000 m.
- 3Drink three to four litres of water a day. Dehydration at altitude is faster than you expect and its symptoms overlap with AMS.
- 4No alcohol for the first 48 hours and no sleeping pills at all. Both suppress the breathing drive you need overnight.
- 5Discuss acetazolamide with your doctor before you travel. It works, it is cheap, and it needs to start a day before you ascend — not after you feel ill.
Flying in versus driving in
Flying Delhi to Leh takes you from 200 m to 3,500 m in eighty minutes, which is the single most aggressive altitude gain available to a tourist anywhere. Driving up from Manali or Srinagar spreads the same gain across two days and dramatically reduces the incidence. If you have ten days, drive at least one direction. If you have six, fly — and give the acclimatisation day back rather than compressing it.
Spiti is different, and easier
Entering Spiti from Shimla climbs gradually over two days through Narkanda, Sarahan and Kalpa before reaching Kaza at 3,800 m. That profile is far gentler than a flight into Leh, which is why we route almost every Spiti group in that direction and out over Kunzum rather than the reverse. The Manali-first route gains 4,551 m at Kunzum on day one and is where most Spiti AMS cases come from.
Who should think twice
Anyone with uncontrolled hypertension, a cardiac event in the last year, severe asthma or COPD, sickle cell disease, or a pregnancy should clear high-altitude travel with their doctor first. Children under two and adults over seventy need a slower profile than the standard itinerary. We would rather move you to a lower-altitude trip than take a booking we are uneasy about, and we will say so on the call.
None of this is a reason not to go. Ladakh and Spiti are extraordinary and the vast majority of travellers manage them without incident. It just requires spending the first day sitting still, which is the one thing an over-packed itinerary will not let you do.
Have us call you instead
Tell us roughly where and when. No payment, no obligation — we will call you back and talk it through.
