Chandrabhaga Glacier Trek AMS Risk Calculator

Extreme risk. You are sleeping at 16,200 ft on Day 3. Any signs of severe headache, vomiting, or loss of coordination must result in immediate descent to Bharatpur.

The primary risks on Chandrabhaga Glacier Trek are: High Altitude Pulmonary/Cerebral Edema (HAPE/HACE) due to the rapid ascent to 15,000+ ft, Hypothermia from freezing winds off the glacier, Severe ankle and knee injuries on the unstable boulder fields. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Chandrabhaga Glacier Trek (17,200ft). 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 5,243m, 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. The terrain is deadly, unmapped, and the altitude risk requires a team to monitor each other for AMS.