Northern Pakistan gets high fast. Deosai National Park sits around 4,114 meters. Khunjerab Pass, on the border with China, reaches 4,693 meters. If you’re heading toward Concordia or a K2 base camp trek, you’ll pass 5,000 meters entirely on foot. At these elevations, altitude sickness is a genuine risk, not just a theoretical one, and it’s worth understanding before you go rather than after symptoms start.

Altitude sickness guide for northern Pakistan: what it is

Essentially, Acute Mountain Sickness (AMS) happens when you gain altitude faster than your body can adjust to the drop in oxygen. It doesn’t care how fit you are. Marathon runners get it. Experienced trekkers get it. Age, fitness, and prior high-altitude experience don’t reliably predict who’s affected, which is exactly why prevention matters more than toughness here.

Symptoms typically start above 2,500 meters and become more common the higher you go. Deosai, Khunjerab, and most of the classic Gilgit-Baltistan trekking routes sit well within that range.

Recognizing the symptoms

First, mild AMS feels a lot like a hangover: headache, nausea, fatigue, dizziness, and trouble sleeping. These symptoms are unpleasant but usually manageable, and they’re your body’s signal to slow down, not necessarily to panic.

Severe cases are a different matter entirely. High Altitude Cerebral Edema (HACE) involves brain swelling and can cause confusion, loss of coordination, and an unsteady walk. High Altitude Pulmonary Edema (HAPE) involves fluid in the lungs, with symptoms like breathlessness even at rest, a persistent cough, and chest tightness. Both are medical emergencies. Both require immediate descent and medical attention. They’re rare, but they are the reason altitude sickness deserves to be taken seriously rather than shrugged off as a bit of a headache.

How to prevent it

• Ascend gradually. Give your body time to adjust rather than climbing straight to your highest point. Where possible, avoid gaining more than 500 meters of sleeping altitude per day once you’re above 3,000 meters.
• Stay hydrated. Dehydration makes AMS symptoms worse and easier to mistake for something else. Drink more water than you think you need.
• Skip the alcohol. It dehydrates you and can mask early symptoms, which is the opposite of what you want at altitude.
• Eat enough carbohydrates. Your body processes oxygen more efficiently on a carb-heavy diet than a heavy, fatty one, especially at elevation.
• Talk to a doctor before you go. Some travelers take a prescription medication to help with acclimatization. Whether it’s right for you, and at what dose, is something to discuss with a physician before your trip, not something to figure out on the mountain.

What to do if symptoms start

So for mild symptoms, stop ascending and rest at your current altitude until you feel better. Many people improve within a day without needing to descend at all. Drink water, avoid pushing harder, and monitor how you feel rather than trying to push through it.

If symptoms don’t improve, or if you notice anything resembling HACE or HAPE, descend immediately. Altitude sickness is one of the few conditions where descending even a few hundred meters can bring real, fast relief. Don’t wait to see if it passes on its own once symptoms are serious. Tell your guide or travel companions right away. This isn’t something to push through alone.

Specific to Pakistan’s north

Specifically, a few of the northern areas covered on this site carry real altitude considerations worth knowing before you go:

• Deosai National Park sits at roughly 4,114 meters. Most visitors reach it by road rather than on foot, which means less time to acclimatize naturally, so pace yourself even if the drive feels easy.
• Khunjerab Pass, at 4,693 meters, is reachable by road from Hunza. The altitude gain from Hunza’s valley floor happens quickly, so mild symptoms on the drive up aren’t unusual.
• Concordia and K2 Base Camp treks climb well past 5,000 meters on foot over multiple days, and proper acclimatization days built into the itinerary matter more here than almost anywhere else in the country.

None of this is a reason to skip these places. It’s genuinely a reason to plan for them properly. Pair this with the rest of your prep, our currency and cash guides cover the practical side, so altitude is one less thing to figure out once you’re already there.

Frequently asked questions

At what altitude does altitude sickness start?

Symptoms typically begin above 2,500 meters, though they become more common and more severe the higher you climb. Some people are affected as low as 2,400 meters.

Is Deosai National Park dangerous for altitude sickness?

At roughly 4,114 meters, mild AMS symptoms are possible, especially since most visitors arrive by road rather than gradually on foot. Take it easy on arrival and stay hydrated.

Can fit, healthy people still get altitude sickness?

Yes. Fitness doesn’t reliably predict who gets AMS. It affects experienced trekkers and first-timers alike, which is why prevention matters regardless of your fitness level.

What’s the difference between AMS and HAPE or HACE?

AMS is the mild, common form, with symptoms like headache and nausea. HAPE (fluid in the lungs) and HACE (brain swelling) are rare but serious complications that require immediate descent and medical attention.

Should I take medication to prevent altitude sickness?

Some travelers do, but it’s a decision to make with a doctor before your trip, based on your own health history and itinerary, not something to self-prescribe once you’re already in Pakistan.