Is the Upper Mustang Trek Affected by the 2026 Nepal Floods?
No — and Upper Mustang is one of the driest, safest regions to trek right now. The 26 August flood hit Rasuwa; Mustang sits in the rain shadow behind the Himalaya, dry and open.
📍 Developing story — live figures
The 2026 Nepal floods are a developing emergency and the casualty and damage numbers are still moving. For the latest verified death toll, missing and rescued figures, and region-by-region trek status, follow our continuously-updated Nepal Floods 2026: Live Updates — we do not freeze provisional numbers into a page like this one.
Last updated: 29 August 2026. If you are booked on the Upper Mustang trek this autumn, here is the short, honest answer — and it is a reassuring one.
Is the Upper Mustang trek affected by the 2026 Nepal floods? No — and Mustang is genuinely one of the safest, driest places to trek in Nepal right now. The flash flood of 26 August 2026 hit the Rasuwa district in Nepal's north: the Bhote Koshi, the Tibet border at Rasuwagadhi, and the Langtang road-head. Upper Mustang sits far to the west, in the rain shadow behind the Annapurna and Dhaulagiri massifs — a true high-altitude desert that the monsoon barely reaches. While the rest of the country was under heavy rain, Mustang stayed dry. Flights and jeeps to Jomsom are running, the trail up the Kali Gandaki to Lo Manthang is open, and the lodges are operating. If your Mustang trip is booked for October or November, your plans stand.
Upper Mustang trek — the honest status
- Affected? No — and it is a rain-shadow desert. The flood was on the Bhote Koshi in Rasuwa. Mustang is on the far side of the country and sits behind the Himalaya, in the driest corner of Nepal. It is one of the few regions that keeps trekking straight through the monsoon because it gets so little rain.
- Access? Open. You reach Mustang via Jomsom — a short Pokhara–Jomsom flight (mornings only; afternoon winds close the strip) or a jeep along the Kali Gandaki (roughly 180 km, 7–9 hours from Pokhara). The Pokhara–Jomsom air route has resumed for the autumn season. Weather-permitting as always, so confirm your flight on the day.
- Best season? October–November for clear skies and the classic desert light — though Mustang's dryness makes it a rare all-but-year-round option. The Rasuwa flood zone is nowhere near it.
Why Mustang barely felt the monsoon at all
This is the part that surprises people. The 2026 floods were a monsoon story — heavy rain, swollen rivers, saturated slopes. Upper Mustang is the one major trekking region that is defined by the absence of that rain. It lies north of the main Himalayan crest, in the rain shadow of the Annapurna and Dhaulagiri ranges, which wring the moisture out of the monsoon clouds before they can climb over. What is left on the far side is a wind-carved high desert of ochre cliffs, eroded canyons and ancient walled towns — landscape that looks more like Tibet or Ladakh than green, dripping middle-hills Nepal.
The flood, by contrast, came down the Bhote Koshi in Rasuwa, out of Tibet and into the Trishuli — a completely separate river, hundreds of kilometres east. Mustang is drained by the Kali Gandaki, flowing south between the giants. Worst-hit were Timure and Syabrubesi, the road-head for Langtang. Nothing on the Mustang route goes anywhere near Rasuwa. If anything, the contrast is the point: while parts of Nepal were flooding, Mustang was dry, bright and open.
The Upper Mustang trek, leg by leg
The clearest way to see it is unaffected is to walk through it as we run it and check each stage against the flood zone.
| Region / stage | Status | What to do |
|---|---|---|
| Kathmandu / Pokhara (arrival, permits, briefing) | Normal | Nothing — unaffected hubs |
| Pokhara to Jomsom (2,720 m) — flight or jeep | Operating | Fly in the morning; confirm on the day |
| Kagbeni, Chele, Ghami (Kali Gandaki, rain shadow) | Trail open, dry desert | Trek as planned |
| Lo Manthang (3,840 m), Chhoser sky caves | Open | Trek as planned; enjoy the walled city |
| Restricted-Area Permit (RAP), US$50 per person per day | Issued normally + licensed guide | Book through a registered operator (required) |
| Rasuwa / Bhote Koshi corridor | Flood-hit | Not on this route — irrelevant to Mustang |
Upper Mustang is a restricted area: it requires the special RAP at US$50 per person per day, a licensed guide and a minimum of two trekkers, all arranged through a registered agency. That permit is issued in Kathmandu or Pokhara, never in Rasuwa, so the flood has no bearing on it. You also cross into the Annapurna Conservation Area, which needs the ACAP permit — again, unaffected.
Is there anything to watch on a Mustang trip?
On the flood question, genuinely nothing — this is about the most flood-insulated trek in the country. The things to plan for in Mustang are its own character: high, dry, and famously windy by afternoon, which is exactly why Jomsom flights go early. The road now reaches deep into Mustang, so a good itinerary walks the quiet old trails and side-valleys rather than the jeep track. The Rasuwa flood is a serious reminder that Nepal faces fast mountain hazards in the monsoon-fed valleys, and we cover that properly elsewhere — but Mustang is the rain-shadow exception, and it is open and dry.
A local guide's take — Bishnu Adhikari
I sort out the logistics, and I will be honest: when people ask me where in Nepal is safest to walk right after a monsoon flood, Mustang is my first answer. It is a high desert — it does not get the rain that causes these floods, and it is on the opposite side of the country from Rasuwa. My thoughts are with the families in the flood zone; that is the real story. But if your route is Upper Mustang, keep your dates with confidence. The ochre cliffs and the walled city of Lo Manthang under an October sky are one of the great sights on earth, and the region is running completely normally.
Booked, or planning ahead? Ask us anything — no pressure
For a straight answer on Jomsom access, permits and your exact dates, message us on WhatsApp or use our contact page. Our full Mustang route, day by day and with real prices, is here: Upper Mustang Trek — 12 days. We will tell you honestly what to expect and what to book.
What you can book for autumn
Mustang trips running normally this October and November
These are the departures we are putting people on right now, priced from the per-person rate a small group pays:
- Upper Mustang Trek — 12 days · from US$2,250 per person in a small group. The classic route to Lo Manthang and back.
- Upper Mustang Trek — 15 days · from US$2,600 per person in a small group. A slower version with more side-valleys and cave towns.
Related reading
- Nepal trekking conditions right now: region-by-region status after the 2026 floods
- Bhote Koshi flash flood, 26 August 2026: what happened in Rasuwa district
- Nepal Floods 2026: live updates, death toll and trek status
Sources: current Pokhara–Jomsom flight and road access per Nepal operator advisories (Summit Air's Pokhara–Jomsom route resumed for the season); Upper Mustang restricted-area permit US$50/person/day; region and route details reflect our own on-the-ground knowledge of Mustang and Rasuwa. Flood figures are held in the live tracker, which we update as authorities confirm them. Jomsom flights are morning-only and weather-dependent — confirm on the day.
If you want to help. Nepal’s official relief channel is the government’s Prime Minister’s Disaster Relief Fund — restricted by law to rescue, relief and rehabilitation, audited annually, and it takes international cards directly. We collect nothing and receive nothing. Be careful of account numbers circulating in forwarded messages: disaster fundraising draws scams within days.
Cover photo: Mohan K. Duwal via Wikimedia Commons (CC BY-SA 4.0).
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