A crucial suspension bridge over the Simbua River along the Kanchenjunga South Base Camp trekking route has been swept away by a flash flood, cutting off access to one of the country’s most remote and scenic trekking destinations.
The incident occurred near Thorongdin, a key stop on the trail, which lies within Siringa Rural Municipality–8, Yamphudin. According to Ward Chairperson Krishna Gurung, the bridge is believed to have been destroyed by a strong flood event that struck the area during the night of Ashar 28 (July 12, 2025).
“The rising water levels caused by heavy monsoon rain likely triggered the flood that washed away the bridge. We suspect it happened sometime late at night,” said Gurung.
Access to Kanchenjunga South Base Camp Disrupted
The destruction of the bridge has rendered the main trekking route to the Kanchenjunga South Base Camp impassable, affecting both domestic and international trekkers as well as locals who rely on the trail for movement and trade. The route from Yamphudin to the base camp passes through Naya Jhoreni, Jhande Danda, and Thorongdin, making the washed-away bridge a vital connector.
Local tourism operators have expressed concern over the disruption, especially during the monsoon season when landslides, swollen rivers, and poor trail conditions already pose significant risks.
“This bridge was one of the most critical structures along the trail. Without it, not only is trekking activity halted, but locals are also unable to travel or transport supplies,” said one local guide.
Bridge Constructed Under Former Remote Area Development Committee
The now-destroyed bridge had been constructed by the Remote Area Development Committee, which operated under the former District Development Committee (DDC) structure. Built to improve accessibility in this remote region of eastern Nepal, the bridge had long served as an important infrastructure link for tourism, livelihood, and communication.
Despite its significance, local residents say the bridge had not received adequate maintenance in recent years. “With increasing rainfall and changes in river flow patterns due to climate change, such structures need to be regularly reinforced and evaluated,” Gurung noted.
Immediate Impact on Tourism and Local Communities
The Kanchenjunga trekking route, although more isolated than others like Everest or Annapurna, draws a niche segment of trekkers seeking wilderness, biodiversity, and cultural immersion. The South Base Camp, in particular, offers close-up views of the third-highest mountain in the world, Mt. Kanchenjunga (8,586 m).
Local homestays, porters, guides, and yak herders depend heavily on seasonal trekking activity for their income. With the route closed, the economic impact is likely to be significant in the coming weeks.
“Trekkers had started returning after the pandemic and road disruptions. This incident is another setback. We hope authorities can act quickly,” said a tourism entrepreneur from Yamphudin.
Call for Immediate Assessment and Reconstruction
Local leaders and conservation groups are urging the government to send a technical team for damage assessment and to initiate plans for rebuilding the bridge as soon as possible. There are also calls for temporary solutions, such as rope crossings or alternative paths, to restore some degree of connectivity in the interim.
The rural municipality has informed the Department of Tourism, Trekking Agencies’ Association of Nepal (TAAN), and Ministry of Physical Infrastructure and Transport about the urgency of the situation.
“Without quick intervention, both tourism and local livelihoods will suffer. The Kanchenjunga region already lags behind in infrastructure. This should be a priority,” emphasized Ward Chair Gurung.
Monsoon Challenges in Eastern Nepal
Eastern Nepal, including Taplejung district where the bridge was located, is especially vulnerable during the monsoon months (June to September). Flash floods, landslides, and rising river levels are common, often damaging roads, trails, and bridges.
Environmental experts are also warning that climate change is intensifying the monsoon’s unpredictability, increasing the frequency and intensity of such incidents.
The Simbua River, which originates from the glaciers of Kanchenjunga and flows downstream through steep and rugged terrain, is known to swell rapidly during the rainy season. Locals recall previous incidents of trail washouts, landslides, and isolation of villages during peak monsoon.
Way Forward: Infrastructure and Resilience
As trekking season nears after the monsoon ends, it is critical to restore safe access to the Kanchenjunga South Base Camp. Conservationists and trekking associations have long demanded improved, climate-resilient infrastructure along Nepal’s high-altitude trails, particularly in lesser-served regions like Kanchenjunga.
For now, authorities are expected to conduct a site visit and prepare a detailed report on damage, followed by budget allocation for bridge reconstruction. Until then, trekkers are advised to avoid the southern approach to the base camp.
The local government, together with park authorities and community groups, continues to monitor the area and assist stranded travelers and residents. As monsoon rains continue, the incident serves as a reminder of Nepal’s urgent need for robust, disaster-resilient infrastructure, especially in tourism-dependent and geographically vulnerable regions.
