Rangdum Kanji Trail Trek AMS Risk Calculator

Sleeping at 15,100 ft (Lartsa) carries high risk. Any severe AMS symptoms at South Base MUST result in an immediate descent back to Rangdum; do not attempt to cross the pass.

The primary risks on Rangdum Kanji Trail Trek are: High Altitude Pulmonary/Cerebral Edema (HAPE/HACE), Drowning/Swept away in river crossings, Hypothermia from wet clothing, Rockfall in narrow gorge sections. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Rangdum Kanji Trail Trek (17,240ft). 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 5,255m, 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.

Strictly prohibited. The unbridged river crossings and glaciated pass make solo travel in this remote region extremely dangerous.