Hampta Pass Trek AMS Risk Calculator

The pass at 4,270m and Chandratal at 4,250m are real AMS risk points. The 2-day gradual approach helps. Watch for symptoms on Day 3 evening at Shea Goru. Most operators carry supplemental oxygen and pulse oximeters.

The primary risks on Hampta Pass Trek are: River crossings — thigh-deep icy water in June and July with real risk of being swept, AMS at Hampta Pass 14,010ft and Chandratal 14,100ft, Steep loose descent on Lahaul side — ankle twist risk, Rapid weather change at the pass — clear morning to whiteout in 2 hours. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Hampta Pass Trek (14,010ft). 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 solo, specifically due to river crossings. Crossing alone with no one to assist if you fall is genuinely dangerous in June–July. September crossings are safer and solo is more manageable then.