Zalung Karpo La Trek AMS Risk Calculator

High risk. The jump from Langthang Chen (14,700 ft) to Base Camp (15,400 ft) is a critical zone. Operators MUST carry emergency oxygen.

The primary risks on Zalung Karpo La Trek are: Severe HAPE/HACE due to sustained altitudes and the 17,050 ft pass, Hypothermia at the high camps (Zalung Karpo La Base), Dehydration in the cold desert air. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Zalung Karpo La Trek (17,480ft). It is not routinely required for healthy trekkers but is recommended if you have had AMS symptoms on a previous high-altitude trip. Never start Diamox without medical advice — it has side effects including tingling fingers and increased urination.

At 5,328m, a resting SpO2 below 80% is a medical emergency and requires immediate descent. Between 80–85% — monitor closely and do not ascend further. Most acclimatized trekkers maintain 85–92% at this altitude. Carry a pulse oximeter and check readings morning and night.

Absolutely prohibited. Once you leave Hankar, the trail disappears into remote gorges. A minor injury can become fatal without a support team.