Nepal is in the middle of the monsoon season, but a sudden flood in Rasuwa has created a much more serious situation. On Wednesday morning, an unexpected surge of water from the Tibetan side entered the Bhote Koshi River, causing major damage in Timure and Syabrubesi. The flood has affected infrastructure, homes, roads, transportation, and people's lives, while emergency teams are working in the damaged areas.
The flood didn’t stop at Rasuwa; it has also moved downstream through the Trishuli River, affecting Nuwakot and Dhading villages, roads, and bridges. Transport services from Kathmandu heading toward several districts have been stopped due to a sudden flood in the Bhote Koshi River.
The situation is also a concern for trekkers because Syabrubesi is the main gateway to the Langtang Region Trek, and the roads through the area connect trekkers and local communities with northern Rasuwa.
At around 9:00 AM on Wednesday, the flood began with an unexpected rise in the Bhote Koshi River. According to reports from the area, the sudden surge came from the Tibetan side and moved quickly through the Bhote Koshi corridor. Timure and Syabrubesi are the seriously affected villages.
Rescue teams from the Nepali Army, Armed Police Force, and Nepal Police have been sent to the affected areas. Helicopters have also been used for search and rescue.
The flood was triggered by an ice-and-rock avalanche that blocked the Lhende Khola, causing water to build up before the blockage gave way and sent a powerful surge downstream into the Bhote Koshi River and Rasuwa. Recent geological assessments and reporting have linked the disaster to this glacier-related collapse.
For detailed information about the developing disaster and rescue operations, travelers can also follow the latest reporting from The Kathmandu Post.
Syabrubesi has been directly affected by the flood and is currently the most essential area for Langtang trekkers to watch.
The Bhote Koshi flood damaged the Syabrubesi market and surrounding settlements, while hydropower projects, roads, and local infrastructure were also affected. Reports also show that the Chilime Hydropower Project was damaged, and the extent of the other damage is still being studied.
The impact of the flood is not limited to buildings. Bridges and roads along the Rasuwa corridor have been affected, creating major transportation problems. For trekkers, this matters because Syabrubesi is the gateway to most Langtang Region Treks. At this moment, the Langtang Region Treks are not possible due to damaged routes and the local communities dealing with the effects of the flood.
The main priority at this moment is not getting trekkers into the Langtang region, but allowing rescue and local assessments to continue safely. Trekkers planning to visit Langtang should wait for updated travel news before making their journey.
The route to Syabrubesi has also been affected by the current flash flood, making it difficult to reach the Langtang region for trekking.
The usual route is:
Kathmandu → Nuwakot → Dhunche → Syabrubesi → Langtang Valley
Roads are damaged, and bridges have been swept away by floods and river erosion along the route to Langtang. The authorities are still assessing the full damage caused by the flood; it has been reported that the Trishuli-Mailung-Syabrubesi route is impassable. Transportation from Kathmandu to Rasuwa or any district has been stopped for now.
For Langtang trekkers, this means the normal route to Syabrubesi is currently not safe or accessible for trekking. We recommend postponing your departure until further notice.
As the water flow increases, the water moves downstream through the Trishuli River, several areas have also been damaged or placed on alert.
Nuwakot villages have reported flooding and damage, while Dhading has also been affected as the river level increased. The river has swept the bridges along with it. Gorkha, Chitwan and the Muglin communities have been warned by authorities.
The affected areas currently include:
At the moment, some Langtang Region Trek departures should remain on hold due to the ongoing flooding and damage around Syabrubesi and the access route to Rasuwa. Syabrubesi is the main gateway to the Langtang Valley, and damage to roads, bridges, and local infrastructure has made it difficult and unsafe for trekkers to reach the area. Wait for further notice about the road and flood.
This does not necessarily mean that the entire Langtang trekking trail has been damaged. You can do other Langtang region treks where Syabrubesi is not in the itinerary.
The current Bhote Koshi flood is most directly affecting the Langtang region because Syabrubesi and the roads into Rasuwa have been seriously affected.
This does not mean that all trekking routes in Nepal are affected or closed. The Annapurna, Manaslu and Everest regions have different access routes, so their conditions should be checked separately.
For example, the current flood in Rasuwa does not automatically mean that the Annapurna Circuit Trek, Manaslu Circuit Trek or Everest Base Camp Trek is closed.
However, it is still the monsoon season in Nepal, and heavy rain, landslides, and road problems can affect individual trekking regions. If you are planning a trek in another part of Nepal, check the latest conditions for that specific route before travelling.
In short: the current flood is a serious concern for Langtang, but it should not be taken as a sign that trekking across all of Nepal has stopped.
If you have a Langtang trek planned for the coming days, the safest option is to postpone your trip until further notice. The situation around Syabrubesi and the roads leading to Rasuwa is still being evaluated.
Before rescheduling your trek:
Do not try to travel through flooded roads, damaged bridges or unsafe areas just to keep your original trekking schedule. Conditions can change quickly, and safety should come before an itinerary. Once access to Syabrubesi is restored and the trekking route has been deemed safe, travelers can reconsider their Langtang plans.
For the latest flood, rainfall, and river conditions, check Nepal's Department of Hydrology and Meteorology (DHM) and follow updates from local authorities and security agencies.
Is the Langtang Trek currently closed?
Due to the flash flood, the route to Syabrubesi has been badly affected by the flood, including damage to roads and other infrastructure. For now, trekkers should avoid travelling toward Syabrubesi and wait for official updates before starting their trek.
What caused the Bhote Koshi flood?
The flood was caused by a large ice and rock avalanche that blocked the Lhende River. Water built up behind the blockage and then suddenly broke through, sending a powerful flood downstream into the Bhote Koshi River and Rasuwa.
Which Langtang treks are affected?
Treks that normally use Syabrubesi, including the Langtang Valley Trek, Tamang Heritage Trek, and Langtang Ganjala Pass Trekking, Langtang Valley Trek Via Thulo Syabru, Langtang Valley and Gosaikunda Trek, are affected because access to the area has been damaged.
Are Everest, Annapurna and Manaslu treks affected?
The Bhotekoshi flood is mainly affecting Rasuwa and the Trishuli–Bhotekoshi corridor. It does not mean that Everest, Annapurna or Manaslu treks are closed. However, monsoon weather can cause separate road and trail problems in these regions, so check your specific route before travelling.
Is it safe to travel to Nepal right now?
The flood is not affecting the whole of Nepal. However, travelers should avoid the affected areas and check the latest road, weather and travel conditions before starting their journey.
