Nara La (Nara Lagna) is a pass at 4,580 m in upper Humla, the final barrier between the Nepali interior and the Tibetan plateau. The top is a barren ridge draped in thousands of prayer flags. From it the unpaved track drops through 24 steep loose-gravel switchbacks into the Humla Karnali gorge and down to the border at Hilsa.
Where Nara La is and what it separates
The pass sits north of Yari, the last settlement on the Nepali side, and above Hilsa on the border. It is the point at which the route stops climbing out of Nepal and starts descending toward Tibet, and the change either side of it is not subtle.
South of the pass the ground still belongs to the Himalayan valley system: a river below, villages on the shelves above it, some grazing, some barley. North of it the country opens into the arid, wide, high-plateau landscape that runs on into Tibet. Standing on the ridge you can see both, and the boundary between them is a line you could draw.
It is worth resisting the superlatives that get attached to this pass. Rankings of the highest motorable pass in this region or that one are contested and change with whatever track was last cut. What Nara La is, plainly, is the crossing that upper Humla has always used to reach Tibet, and it is high enough that the altitude governs everything about how you approach it.
The climb from Yari
The ascent from Yari at about 3,850 m to the pass at 4,580 m is a gain of some 730 m over open, treeless ground. There is nothing technical about it. What there is, in quantity, is exposure: no shade, no shelter, no water you would want to rely on, and a wind that gets up through the middle of the day and blows straight across the line of the trail.
The surface is loose. Gravel and broken rock over a graded base, with sections that have slumped and been patched, and stones that arrive from above on their own schedule. On foot this is tiring rather than difficult. On two wheels it demands constant attention, and in a vehicle it demands a driver who has done it before.
Start early. The weather window on a pass at this height is a morning phenomenon almost everywhere in the Himalaya, and Nara La is no exception: cloud builds, wind rises, and an afternoon crossing is a colder, harder and less rewarding version of the same walk.
Water on the ascent is unreliable. What is running in June is dry in October, and what is running at all is snowmelt, cold and silty, and needs treating like everything else. Fill up at Yari rather than planning around a stream somebody mentioned.
On the pass
The top is bare. Rock, gravel, no vegetation of any consequence, and a horizon that opens north across the plateau. What covers it instead is prayer flags, in a quantity that has to be seen: thousands of them, strung between cairns and poles, layered over decades, the oldest reduced to fibre and the newest still bright.
They are not decoration. Flags are hung on passes because a pass is where the traveller is most exposed and most grateful, and the practice runs the length of the Himalaya. Adding one, or leaving a stone on a cairn, is the customary thing to do and is done quietly.
There is no marker beyond the flags and the cairns, and no shelter of any kind. Nobody lingers at 4,580 m in the wind, and the sensible pattern is a short stop, whatever you came to do, and then down. Cold arrives very quickly once you stop moving.
| Detail | Nara La |
|---|---|
| Elevation | 4,580 m |
| Also written | Nara Lagna |
| South side | Yari, about 3,850 m, the last settlement |
| North side | Hilsa on the border, 3,720 m |
| Descent | 24 steep switchbacks on loose gravel into the Humla Karnali gorge |
| Surface | Unpaved throughout. Gravel, broken rock, patched slumps |
| Shelter on the crossing | None between Yari and Hilsa |
The view from the top
North the ground falls away into the Humla Karnali gorge and then opens out, and beyond it the plateau runs to a horizon with almost nothing vertical in it. South, back the way you came, is the Himalayan valley system: layered ridges, snow on the higher ones, and the sense of looking down a corridor rather than across a plain.
It is a rare thing to see two entirely different landform regimes from one standing position, and it is why people who have crossed a lot of passes remember this one. The clarity at 4,580 m does most of the work. There is very little atmosphere between you and anything you are looking at, which is also why the sun burns as fast as it does.
The 24 switchbacks down
The descent north is the memorable half. The track drops off the pass in 24 tight switchbacks cut into the side of the Humla Karnali gorge, each one a hairpin on loose gravel with a considerable drop on the outside and very little margin anywhere.
Walking it is straightforward if slow, and it punishes knees. Riding or driving it is the part of the whole Humla corridor that concentrates the mind most: on a loose surface, on a gradient, on hairpins, brakes do less than instinct expects and the outside edge is not always as solid as it looks. In monsoon 2026 the surface carried water on several of the bends and stones on nearly all of them.
Take it in stages, stop where there is room to stop, and let anything coming up have the inside line. The gorge below is spectacular and the correct time to look at it is when stationary.
Weather and when the pass works
Nara La is crossable in the shoulder seasons and closed or serious for much of the rest of the year. The usable windows in this part of the Himalaya are broadly May to June and late September to early November: the monsoon brings landslides and unstable ground below the pass, and December to April brings snow at 4,580 m that nobody is going to clear for you.
Even inside those windows the mountain sets the terms. Unseasonal snow happens, wind can make an exposed crossing genuinely dangerous, and there is no infrastructure between Yari and Hilsa to retreat into. Anyone crossing with animals or vehicles should coordinate with people in Simikot who know what the pass has been doing recently rather than relying on a season chart. The seasonal guide to West Nepal covers the broader pattern.
The other seasonal factor is what is crossing with you. The pass carries animals as well as people, and a mule or yak train met on a hairpin is not something to squeeze past. Stand on the inside of the track, stay still, and let it go through. On the descent particularly, an animal that turns on loose gravel takes the whole line with it.
Crossing on foot, on wheels, and the altitude problem
The difference between arriving at 4,580 m on foot and arriving there on wheels is the whole safety story of this pass. Walking forces a rate of ascent the body can broadly keep up with. A vehicle does not, and it is entirely possible to be standing on Nara La a matter of hours after being somewhere very much lower, in a state the walk would never have permitted.
The rule that follows is simple and it applies to everyone on this route: do not gain the pass without having slept at intermediate elevations first. Yari is the last acclimatisation point and it exists for exactly this reason. Symptoms at 4,580 m develop in an environment with no shelter, no help and a 24-hairpin descent in either direction, which is why the decision has to be made before the crossing rather than on it. Our altitude and acclimatisation guide covers the thresholds, and the Simikot guide covers the acclimatisation days the route depends on.
What to carry over the pass
There is nothing between Yari and Hilsa: no shelter, no shop, no reliable water and no help. The crossing has to be self-contained, and the packing for it is done in the village rather than on the ridge. The Yari guide sets out what has to leave the settlement with you.
Two things belong to the pass rather than to the stage below it. Sun protection has to work at 4,580 m, which means a hat, high-factor cream and proper sunglasses rather than fashion ones, because snow and pale gravel both throw light straight back at you. And on wheels, a mechanical failure on the switchbacks is resolved by you or by whoever comes past next, so carry tools you actually know how to use. There is no recovery service anywhere in Humla.
The old road over the pass
Nara La is not a modern route. It is one of the crossings that carried the trans-Himalayan trade for centuries, and the villages on either side of the pass existed because of that trade before they existed for any other reason. Our guide to the trans-Himalayan salt trade routes covers what moved, in which direction, and what happened to the system when the border hardened.
What crosses today is different in kind but not in direction. Manufactured goods, rice, oil and fuel come south from the Chinese side to supply upper Humla, and pilgrims cross north on their way to Kailash. The pass has never stopped being a working border.
Below it, on the Nepali side of the river, is Hilsa, and across the bridge from Hilsa is Purang, also called Taklakot.
Before you travel. Humla is a restricted border district and conditions change without notice. Roads close, flights are cancelled, permit rules and fees are revised, and the Hilsa crossing opens and shuts to different categories of traveller. Confirm the current position with the District Administration Office in Simikot, the Department of Immigration, or a registered local operator before you commit to a route.
Frequently Asked Questions
How high is Nara La?
4,580 m. It is also written Nara Lagna, and it sits between Yari at about 3,850 m on the Nepali side and Hilsa at 3,720 m on the border.
Where is Nara La pass?
In upper Humla in Karnali Province, north of Yari and above Hilsa. It is the last pass between the Nepali interior and the Tibetan plateau on the route from Simikot to the border.
How many switchbacks are on the descent from Nara La?
Twenty-four, on the northern side, dropping from the pass into the Humla Karnali gorge toward Hilsa. They are tight hairpins on loose gravel with substantial drops on the outside.
When can you cross Nara La?
Broadly May to June and late September to early November. Monsoon brings landslides and unstable ground below the pass, and snow closes it from around December to April. Nothing is cleared at that altitude, so confirm recent conditions in Simikot rather than relying on a seasonal chart.
Do you need a permit to cross Nara La?
Yes. The whole area north of Simikot is restricted. The permit is charged per week with a two-person minimum and a registered Nepali guide is required, with checks at Simikot, Muchu and Hilsa. Confirm the current position with the Department of Immigration or an operator in Simikot.
Is Nara La dangerous?
It is high, exposed and unpaved, with no shelter between Yari and Hilsa and loose gravel on a 24-hairpin descent. The main risk is altitude, particularly for anyone who gained height quickly on wheels rather than on foot. Acclimatise below the pass and cross early in the day.
Why are there prayer flags on Nara La?
Passes are where travellers are most exposed, and hanging flags at the crossing point is a practice that runs the length of the Himalaya. The accumulation at Nara La has built up over decades, layer on layer, and adding one or leaving a stone on a cairn is the customary thing to do.