How a narrow-gauge railway conquered the steep Himalayan slopes

Countries & Cities · Published 12 October 2026 Swipe more like this →

In short: To reach the heights of Darjeeling, engineers had to outsmart the mountains. Using ingenious zig-zags and loops, the Darjeeling Himalayan Railway overcomes extreme gradients, transforming a treacherous ascent into a scenic journey that has captivated travelers for over a century.

Constructed between 1879 and 1881, the Darjeeling Himalayan Railway (DHR) connects New Jalpaiguri to Darjeeling in West Bengal, India. The line spans approximately 88 km (55 mi) and climbs from about 100 m above sea level to roughly 2,200 m at Darjeeling. To manage this dramatic elevation gain, the railway employs specialized engineering techniques, including six zig-zags and three loops—originally five—to navigate the steep terrain.

The railway's history is marked by both resilience and adaptation. After being built to connect the foothills to the mountains, the line has survived significant natural challenges, including an 1897 earthquake, an 1899 cyclone, and heavy rains in 1902 that washed away the Teesta bridge. Despite these setbacks, the DHR remains a vital part of the region's infrastructure. In 1951, the Indian government purchased the railway, and it eventually became part of the Northeast Frontier Railway zone.

Today, the DHR is recognized as a UNESCO World Heritage Site, a distinction it received on 5 December 1999. While modern diesel locomotives handle much of the scheduled service, the railway maintains its heritage through steam-hauled services, such as the Red Panda service from Darjeeling to Kurseong. The line's unique character is preserved through its vintage British-built B-Class steam locomotives, though many of these historic engines are now used for special enthusiast trips rather than daily transit.

The railway's operational landscape continues to evolve. After a 18-month closure due to the COVID-19 pandemic, service resumed in August 2021 with new vistadome coaches for tourists. While the railway faces competition from faster road transport on the Hill Cart Road, its historical significance and the engineering required to traverse the Himalayas ensure its continued importance as a cultural and tourist landmark.

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