Indrahar is the pass. If you have done Triund, you have looked up at the ridge that includes Indrahar. The crossing at 4,342 metres is the historical pilgrim route used by Gaddi shepherds moving sheep between Kangra and the Ravi valley in Chamba. It is a serious trek. People underestimate it every summer. We are writing this guide to help you plan it honestly.
Fitness
The baseline is a five-kilometre run under thirty minutes, or a ten-kilometre fast walk with a day-pack with no aches. You should have done at least one overnight trek above three thousand metres in the previous six months. If you have not, consider a warm-up like Prashar Lake or Kheerganga before attempting Indrahar.
The itinerary
Most operators, including us, split the trek into four days. Day one is McLeod Ganj to Triund. Day two is Triund through Laka Got to Lahesh Cave at three thousand five hundred metres. Day three is the summit push to the pass and descent back down to Triund. Day four is the return to McLeod Ganj. The reason for the three-day camp rotation is acclimatisation. The summit cannot be attempted from Triund the same day. It is too much altitude too fast.
Lahesh Cave
Lahesh is a massive overhanging rock slab used for centuries by Gaddi shepherds for shelter. We pitch bivouac tents under the overhang. It is dry and wind-sheltered but cold. Night temperatures in June and September drop below freezing. In July and August the cave gets condensation and you will wake up to damp tent walls. Pack a proper sleeping bag rated to minus five, not the all-purpose one you took to Triund.
Gear that really matters
Four-season boots with a proper sole, not the trail runners that got you up Triund. Category three or four sunglasses, because the scree field near the pass is a snow basin in May and the glare will burn your eyes in an hour without protection. Inner and outer gloves. A down or synthetic-fill insulation layer. Gaiters if you are trekking in April, May, or late October.
AMS protocol
We observe a simple rule. Day two is a climb-rest day. No one summits on day two. Anyone with a headache, nausea, or unusual breathlessness at Lahesh descends. The lead guide carries a pulse oximeter and a satellite SOS. If you have a prior AMS history or a pre-existing condition, speak to a doctor about Diamox before the trip. We do not supply it.
When to go
Ideal windows are mid-May to mid-June and mid-September to mid-October. The pass holds snow until early June most years. Monsoon makes the scree field dangerous. October is often the clearest month but the morning temperatures at the pass can drop to minus ten.