Rumtse Tso Moriri Trek AMS Risk Calculator

Sleeping at 16,800 ft (Gyamalpari) carries massive risk. If severe AMS symptoms present, the sheer remoteness makes evacuation extremely difficult. Ascend slowly and use Diamox preventatively under medical guidance.

The primary risks on Rumtse Tso Moriri Trek are: Severe Acute Mountain Sickness (HAPE/HACE), Hypothermia from freezing river crossings or wind exposure, Dehydration and Sunstroke, Extreme isolation in case of trauma. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Rumtse Tso Moriri Trek (17,847ft). 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 5,440m, 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 terrain is unmarked, massive, and a solo emergency at 17,000 ft with no communications is fatal.