Nepal Flood 2026: What Trekkers Need to Know

A glacier collapse north of Langtang Lirung sent a flash flood down the Bhotekoshi and Trishuli rivers on the morning of 26 August 2026, killing at least 389 people in Nepal and destroying 42 kilometres of the road to the Tibet border. The flood ran 72 kilometres through Rasuwa and Nuwakot. It did not touch Everest, Annapurna, Manaslu, Pokhara or Kathmandu, all of which are running normally. If you are trekking in Nepal this autumn, the practical question is narrow: does your route pass through the Trishuli corridor or start at Syabrubesi? For most trekkers the answer is no, and nothing changes. This page sets out which routes are affected, what is still unresolved about Langtang, and what to do if you already have a booking.

Is it still safe to trek in Nepal?

Nepal has eight trekking regions of any scale, and the 26 August flood reached one of them. The Bhotekoshi flood was a localised event confined to a single river system in the country's north-centre. That distinction matters, because "Nepal flood" headlines carry no geography, and travellers reading them from abroad have no easy way to tell whether a disaster sits 15 kilometres from their trailhead or 300.

Rasuwa district is the affected area, and it is roughly 60 kilometres north of Kathmandu. The Everest region sits about 140 kilometres east of it. Annapurna and Pokhara sit about 100 kilometres west. Neither watershed connects to the Trishuli, so neither received any of the floodwater. Trails, lodges and airstrips in both regions were reported undamaged.

The honest caveat is that this is a fast-moving situation and the assessments are days old. Survey teams have not walked every trail in Rasuwa. Treat anything below as current to 28 August 2026 and check again before you fly.

What happened on 26 August

At 02:52 UTC, which is 08:37 in Nepal, part of an unnamed glacier north of Langtang Lirung broke away and fell several hundred metres. The ice melted from the friction and velocity of its own impact. The collapse was violent enough to register as a magnitude 5.2 seismic event on instruments in Germany and the United States, which is how the timing is known so precisely.

The resulting surge travelled 72 kilometres down the Bhotekoshi into the Trishuli, through Rasuwa and Nuwakot districts and on into Gyirong county on the Tibetan side. Nepal's Department of Roads confirmed the entire 42 kilometre road from Betrawati to the Rasuwagadhi border crossing was destroyed at multiple points. A further 16 kilometre stretch nearer the border, recently rebuilt with Chinese financing, was also swept away.

41 bridges were damaged or carried off, along with the customs post at Rasuwagadhi and more than 300 vehicles. Six hydropower facilities were hit, removing 431 MW from the national grid, with a further 470 MW of projects under construction damaged. Because the road itself is gone, most of the rescue effort has had to run by helicopter.

As of 27 August 2026 the confirmed toll in Nepal stood at 389 dead and 910 missing, with 3 dead and 558 missing across the border in Tibet. Figures for missing tourists have varied by source: the Nepal Tourism Board initially reported roughly 400 travellers out of contact, while later compilations listed 668 foreign tourists from 34 countries alongside 127 Nepali domestic tourists. Take the higher figures as provisional. Reconciliation of who was actually in the valley is still going on.

Which trekking routes are closed

Five areas in and around Rasuwa should be treated as closed to trekkers. These are active recovery zones with search teams working in them, and the access roads are broken.

• Rasuwagadhi and the Kerung border crossing. The customs post and its bridges are gone. The crossing is shut, which also closes the overland route to Kailash and the Tibet trade road.
• Timure. One of the worst affected settlements on the river. Recovery work is ongoing.
• Syabrubesi. Heavy damage to riverside buildings and services. This is the ordinary road head for Langtang, which is why its condition matters beyond the village itself.
• The Betrawati to Rasuwagadhi road. 42 kilometres destroyed at multiple points. There is no reliable vehicle access north.
• The Tamang Heritage Trek. The route runs through the Bhotekoshi and Timure corridor the flood came down. Treat it as closed until surveyors have walked it.

Langtang and Gosaikunda: the unresolved cases

The Langtang Valley Trek is the one route where the picture is genuinely unsettled, and it deserves more than a yes or no. Two rivers meet at Syabrubesi. The Bhotekoshi, which carried the flood, comes down from the north. The Langtang Khola, which the trekking trail follows east towards Kyanjin Gompa, is a different river and did not carry the surge.

That geography is the reason reports conflict. The upper Langtang trail above the confluence was not in the flood path, and there is no verified report of the trail from Syabrubesi to Kyanjin Gompa being destroyed. The problem is access rather than the trail itself: Syabrubesi is reached by the Pasang Lhamu Highway, and that road is damaged and currently closed to tourist traffic. A trail you cannot reach is closed in practice, whatever its own condition.

There is a second reason for caution that has nothing to do with the road. The glacier that failed sits north of Langtang Lirung, which is the peak at the head of the Langtang valley itself. Until glaciologists have assessed what remains of that ice mass and whether more of it is unstable, upper-valley routes near it warrant a formal hazard assessment rather than an optimistic reopening. Gosaikunda sits in the same catchment and carries the same caveat.

Our position is conservative. We are not operating Langtang, Gosaikunda or Tamang Heritage departures until the road is reopened and a competent authority has assessed the upper valley. We would rather move your dates than be first back in.

Which regions were not affected at all

Kathmandu is 60 kilometres south of the affected valley and was not touched. Hotels, restaurants, domestic flights and city services are operating normally, and Tribhuvan International Airport has run without interruption throughout.

The Everest region reported no flood damage on the main trekking routes. Lukla, Namche Bazaar and the trail to Base Camp are unaffected, and the Everest Base Camp Trek is running to schedule. The Khumbu drains through the Dudh Koshi, a separate river system entirely.

The Annapurna region is likewise clear. The Annapurna Base Camp Trek and the Annapurna Circuit reported no trail damage from this event, and Pokhara, the staging city for both, was not directly affected. The Manaslu Circuit is intact, though Gorkha district was placed under a flood warning downstream and it is worth confirming road conditions on the drive in.

Chitwan and Lumbini reported no impact on tourism areas. One caution applies to Chitwan: the Prithvi and Tribhuvan highways carry traffic that also uses parts of the Trishuli corridor, so confirm the highway status before a road transfer rather than assuming it.

Our team is safe

Every member of the Swotah team is accounted for and safe, along with the guides and porters who were on the ground with our groups. We had no clients on the affected routes when the flood came down.

Several of our staff have relatives in the districts the flood ran through, and some are volunteering with relief efforts this week. If your enquiry takes a little longer to answer than usual over the next few days, that is why.

If you have a Nepal trip booked this autumn

The autumn trekking season runs from mid-September to late November and is the busiest of the year. Bookings for it are already made, which is why the timing of this flood matters more than the size of the affected area suggests.

Check three things in order. First, does your itinerary include Langtang, Gosaikunda, Tamang Heritage, or an overland Tibet or Kailash leg through Rasuwagadhi? If yes, it needs rerouting. Second, does any road transfer use the Trishuli corridor, which includes some Kathmandu to Chitwan and Kathmandu to Pokhara road routes? If yes, confirm the current highway status or fly. Third, if neither applies, your trip is very likely unchanged.

Trekkers holding Langtang permits should know that permit offices can reissue for a different region rather than refund, so ask before cancelling anything. If you booked with us, write to us and we will tell you plainly whether your route is affected and go through the options with you before you cancel anything.

How to help, and the one place to send money

The Prime Minister's Disaster Relief Fund is the Government of Nepal's official mechanism for disaster donations, run by the Office of the Prime Minister. By statute the money can only fund rescue, treatment, relief, rehabilitation and reconstruction. It cannot be spent on administrative costs, and the accounts are audited annually.

Nepal Clearing House opened the fund's gateway to international donors this week at pmdrf.nchl.com.np, which now accepts foreign cards alongside Nepali mobile banking, connectIPS and wallets. Fraudulent appeals referencing this flood are already circulating on social media and messaging apps, and we are deliberately not linking to any private fundraiser because we cannot verify them. Check the address bar reads pmdrf.nchl.com.np before entering card details. Full payment details are on our Rasuwa flood update page.

Swotah collects, holds and forwards none of this money. The link goes straight to the government portal.

Where to check before you travel

Nepal's National Disaster Risk Reduction and Management Authority publishes the official casualty and damage figures, and its numbers supersede anything in this article. The Department of Roads issues highway status updates, and the Nepal Tourism Board publishes travel advisories for visitors.

Your own government's travel advice is worth reading alongside those, though foreign advisories tend to lag local conditions by several days and often describe whole countries rather than districts. For route-level questions about a specific trek, ask an operator who is actually in Kathmandu and can call the road head.

We will update this article as survey teams report and as roads reopen. When Langtang is genuinely walkable again we will say so here, and not before.