Sundardhunga Glacier Trek AMS Risk Calculator

Well-staged ascent profile with nights at 10,200, 12,400, and 14,200 ft minimizes AMS risk. Monitor SpO2 at each camp level. Descend from any camp immediately if severe headache + vomiting develop. Diamox 125mg BD from Day 2 recommended for those with prior AMS history.

The primary risks on Sundardhunga Glacier Trek are: AMS at 12,400 ft moraine camp and 14,200 ft base camp — moderate risk if ascent pace is too fast, Moraine instability — individual boulders shift without warning. Never jump between boulders near glacier margin, Glacier margin crevasse danger — do not approach glacier ice edge without guide, Complete wilderness isolation — no rescue infrastructure above Khati. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Sundardhunga Glacier Trek (14,600ft). 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.

Not recommended. The Sundardhunga moraine navigation above 11,500 ft is not feasible solo without prior visits to establish the stable boulder line. A Khati local guide is essential for safety AND route finding.