A 15-kilometre corridor on National Highway 17, formerly designated NH 31, marks one of North Bengal's most dramatic geographic transitions. One moment you're on the hot, honking plains outside Siliguri, the next you round a bend and the Teesta appears, jade in winter and a churning ochre torrent in the monsoon, funnelled between tiger-statued stone piers and the last ridges of the Himalaya. This is the Mongpong-Sevoke-Coronation Bridge corridor and it is the most dramatic gateway in eastern India.
Virtually every traveller headed from the plains to Darjeeling, Gangtok, Kalimpong or the Dooars crosses it, and most of them make the same mistake: they treat it as a photo stop. Stay a little longer, an afternoon, an overnight, ideally two nights at the forest bungalow, and the corridor reveals itself as a destination in its own right, a place of colonial engineering, riverine temples, low-slung sal forests, Himalayan birdlife and the particular quality of light that only exists where a river meets a plain.
A Note on Geography
A brief but useful untangling before you go. The stretch covered by this guide crosses three modern districts of West Bengal:
- Sevoke, the Sevokeshwari Kali Mandir and the western end of the Coronation Bridge sit in Darjeeling district.
- The Coronation Bridge's eastern approach, the village of Mongpong and the forest bungalow lie in Kalimpong district (carved out of Darjeeling in 2017).
- A few kilometres further east, once you've crossed the Leesh and the Chel, you're in the Dooars plains of Jalpaiguri district and the landscape switches to tea gardens.
The story of the bridge
The Coronation Bridge, officially the Sevoke Roadway Bridge, locally Baghpool (tiger bridge), is the corridor's headline act and it has one of the better backstories in South Asian engineering.
By the 1930s the British badly needed a dependable road link from the Bengal plains to Darjeeling, their summer capital and onward into the Dooars and Bhutan. The Teesta was the problem. The river is brutally fast, boulder-strewn and prone to monstrous floods; the riverbed is too unstable to sink piers into and a suspension bridge of that era could not have survived a serious monsoon. British engineers were, by all accounts, stumped.
Three Bengali architects, A.C. Dutt, S.K. Ghosh and K.P. Roy proposed a fixed reinforced-concrete arch, anchored directly into the hard rock on either bank and spanning the river in a single leap with no support from below. Under the oversight of executive engineer John Chambers of the Darjeeling PWD, the foundation stone was laid in 1937 by the then Governor of Bengal, John Anderson, to commemorate the coronation of King George VI and Queen Elizabeth. Construction finished in 1941 at a cost of roughly Rs 6 lakh, a significant sum at the time, today equivalent to a few million dollars.
The bridge's main arch spans 81.7 metres. Its red-and-white steel-girder deck pops against the grey of the river. The two weathered statues guarding the eastern (Mongpong) approach are technically lions but have been called tigers for so long that the local name for the whole structure, Baghpool, has stuck.
A few things to know as you stand on it:
- It was designed for a 100-year lifespan. A 2011 earthquake (magnitude 6.9, epicentre in Sikkim) caused visible damage and a 2020 inspection by Jadavpur University engineers identified a 2.5-foot crack in the arch. Vehicles over 10 tonnes are now restricted.
- A replacement bridge has been in planning for years, with the National Highways Authority of India taking over the project in 2025. Until it's built, the Coronation Bridge carries the full load of traffic into Kalimpong, Sikkim and the Dooars, so you'll often sit in a jam of trucks and Sumo taxis here.
- Stopping on the bridge is discouraged but done constantly. The viewpoint laybys on either approach are the sensible place for photos.
- Watch your snacks. The resident rhesus macaques are bold, fast and will relieve you of a camera strap given half a chance.
