Trekking
Thorong La Pass (5,416m): Complete Crossing Guide
Thorong La is the high point of the Annapurna Circuit at 5,416m — the most celebrated mountain pass crossing in Nepal. This guide covers preparation, timing, what to expect, and emergency protocols.
Thorong La Pass (5,416m) is the defining moment of the Annapurna Circuit. Crossing it requires an early start, proper acclimatisation, and respect for the mountain's capacity to close without warning.
Overview
- Altitude: 5,416m
- Start: Thorong High Camp (4,925m) or Yak Kharka (4,018m)
- Crossing time: 5–8 hours to Muktinath
- Difficulty: Very strenuous — long ascent, steep descent
Best Time
October–November for the most reliable conditions. The pass can close in heavy snowfall in any season — always check with your tea house the evening before.
Key Highlights
The summit prayer flags and cairn mark one of the highest trekking passes in the world. On a clear day, views span the Annapurna range, Dhaulagiri, and the Tibetan plateau.
Practical Tips
Start from High Camp no later than 4am. Carry at least 2 litres of water — nothing is available on the ascent. Dress for -15°C wind chill at the top. The descent to Muktinath (1,600m vertical) takes 3–4 hours and is steep — trekking poles essential.
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FAQ
When does the pass close? Heavy snowfall can close it for 1–3 days in any season. Rare in October–November but possible.
What if I get AMS on the pass? Descend immediately toward Muktinath — it is the only direction that helps. Do not try to go back over the pass.
Can I cross the pass in winter? December–February, the pass is frequently closed by ice. Not recommended.
