Dharansi Pass Trek AMS Risk Calculator

Acclimatization protocol is non-negotiable: 2 nights at Ghangaria (10,200 ft) before the high camp push. Hemkund Sahib day-trip to 14,100 ft on Day 3 is critical — not optional. Monitor SpO2 daily from Day 3 onward. Diamox 125mg BD from Day 2 onward recommended for those with prior AMS history. Descend from high camp immediately if SpO2 drops below 80% at rest.

The primary risks on Dharansi Pass Trek are: AMS at Dharansi High Camp (13,800 ft) — risk moderate even with proper acclimatization, HACE/HAPE on Day 5 push to 16,800 ft — critical: any severe headache + vomiting = descend immediately, Snowfield slip on pass approach (June–July) if crampons not worn or improperly fitted, Afternoon weather on the exposed col — wind and cloud can reduce visibility rapidly after 11am, Navigation error on Bhyundar descent side in cloud — multiple creek crossings look similar in poor visibility. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Dharansi Pass Trek (16,800ft). 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.

Illegal without a Forest Department–authorized guide in the inner zone. Beyond legality: the upper sanctuary trail is unmarked, the snowfield requires rope management in early season, and the Bhyundar descent has complex creek crossings that are disorienting in cloud. A competent guide is both legally mandatory and genuinely critical for safety.