Darjeeling Himalayan Railway

The Darjeeling Himalayan Railway is the first and most outstanding example of a hill passenger railway, an engineering feat threaded along the Hill Cart Road (National Highway 110) for much of its 88 km from the plains of West Bengal to Darjeeling at the foot of the Eastern Himalayas. Built between 1879 and 1881 under Franklin Prestage, an agent of the Eastern Bengal Railway, the line opened in stages: Siliguri to Kurseong on 23 August 1880, then the full stretch to Darjeeling on 4 July 1881. The actual climb begins at Sukna (162 m), and from there the line gains roughly 2,100 m of elevation over 70 km — an average grade close to 1 in 28.

Because locomotives could not handle the original gradient of the Hill Cart Road, four loops and four zig-zags were added between Sukna and Gayabari in 1882. Today three loops survive — Loop 3 at Chunbhatti, Loop 4 (Agony Point, the tightest curve on the line) above Tindharia, and the Batasia Loop, built in 1919 just below Ghum to ease the descent into Darjeeling. Six zig-zag reverses help the line negotiate the steeper sections. Five major bridges, 498 minor bridges and 177 unmanned level crossings dot the route, which is otherwise tunnel-free.

Daily diesel services use six 1997-built NDM-6 locomotives (Nos. 600–605), with three more units commissioned at the Northeast Frontier Railway workshops at New Bongaigaon for entry into service during 2025. Vintage 0-4-0 saddle-tank B-Class steam locomotives, built by Sharp, Stewart & Co. and the North British Locomotive Company between 1889 and 1925, haul tourist specials: the daily Darjeeling–Ghum joyride and the steam-hauled Red Panda service between Darjeeling and Kurseong. Of 34 B-Class locomotives originally built, around twelve remained in operating or restorable condition by 2005.

UNESCO inscribed the railway on the World Heritage List on 5 December 1999 under cultural criteria (ii) and (iv); two further mountain lines (the Nilgiri Mountain Railway in 2005 and the Kalka–Shimla Railway in 2008) joined it under the umbrella designation 'Mountain Railways of India'. Vistadome panoramic coaches were introduced on the NJP–Darjeeling run in August 2021. After a July 2024 landslide closed the line for four months, regular through-service resumed on 17 November 2024.

The Darjeeling Himalayan Railway is the prototype of every hill passenger railway built since: ICOMOS, in its 1999 evaluation for UNESCO, described it as 'the first, and is still the most outstanding, example of a hill passenger railway,' applying 'bold and ingenious engineering solutions to the problem of establishing an effective rail link across a mountainous terrain of great beauty.' Its 610 mm gauge — half the width of standard gauge — and its use of loops and zig-zag reverses to gain elevation directly inspired the Kalka–Shimla and Nilgiri lines, also UNESCO-listed.

Ghum station, at 2,258 m (7,407 ft), is the highest in India and the second-highest in the world to be reached by a steam locomotive. The line is one of very few places where 19th-century B-Class saddle-tank steam locomotives still operate over their original route, with Sharp Stewart and North British Locomotive Company examples dating from 1889–1925 hauling tourist services along the same alignment they were designed for. Few passenger railways anywhere preserve such direct continuity between Victorian engineering, surviving rolling stock, and live commercial operation.

The Toy Train runs alongside Hill Cart Road for some 64 km of its 87.48 km length, often so close to traffic and buildings that the route feels more like an urban tramway than a mainline railway. Train drivers sound horns and whistles almost continuously to warn pedestrians; coaches sway through tight curves and creak at the zig-zag reverses as the locomotive runs around the train and pushes for the next stretch. The two-foot gauge keeps everything in miniature — carriages have only 30–50 seats, and the small NDM-6 diesels barely top the height of a tall passenger.

NJP–Darjeeling train 52541 leaves at 08:30 and reaches Darjeeling around 15:35 on Tuesdays, Thursdays and Saturdays. The First Class coaches and an AC Chair Car coach are joined in season by 44-seat Vistadome cars with rotating armchairs, overhead glass panels, charging sockets, mini-pantry and an observation lounge at the rear with floor-to-ceiling windows. The shorter Darjeeling–Ghum joyride runs many times daily, with a 25-minute halt at Ghum (DHR Museum included in the fare) and a 10-minute photo stop at Batasia Loop, where a memorial to Gorkha soldiers of the Indian Army stands at the centre of a circular garden — Kanchenjunga and the eastern Himalayan crest dominate the skyline on clear days.

The Darjeeling project began as a proposal by Franklin Prestage of the Eastern Bengal Railway, who approached Bengal lieutenant-governor Ashley Eden in the late 1870s with plans for a steam tramway from Siliguri to Darjeeling. A committee reported favourably in 1879, and Gillanders, Arbuthnot & Company received the construction contract. Track had reached Tindharia by March 1880, and Lord Lytton became the first viceroy to ride the unfinished line. Colonel F.S. Taylor (Consulting Engineer to the Government of India for Guaranteed Railways) and Prestage himself authorised the Siliguri–Kurseong section for traffic on 23 August 1880; the full Siliguri–Darjeeling stretch opened on 4 July 1881.

When the original alignment alongside Hill Cart Road proved too steep for the small locomotives, four loops and four zig-zags were added in 1882 between Sukna and Gayabari to bring the gradient to a uniform 1 in 28. The line was extended a quarter-mile to Darjeeling Bazar in 1886. Setbacks followed — the 1897 Assam earthquake, the 1899 cyclone, and especially the 1902 monsoon that washed away the Teesta bridge — but services were maintained with transhipment. By 1910 the railway carried 174,000 passengers and 47,000 tons of freight. Bogie carriages replaced four-wheel stock that year, and Batasia Loop was built in 1919 to ease the gradient into Darjeeling.

Indian Railways nationalised the line in 1951, attaching it briefly to the North Eastern Railway and, in 1958, to the Northeast Frontier Railway zone, where it has remained. In 1962 the southern terminus was extended ~6 km from Siliguri to New Jalpaiguri to meet the new broad-gauge main line to Assam. Eighteen months of Gorkhaland unrest in 1988–89 shut the line, but it reopened, and on 5 December 1999 UNESCO recognised it as a World Heritage Site. After a four-month suspension caused by a July 2024 landslide, NJP–Darjeeling through-service resumed on 17 November 2024.

The DHR's three surviving loops and six zig-zag reverses are textbook solutions for narrow-gauge mountain railways and remain the line's signature engineering feature. Loop 4 — 'Agony Point' above Tindharia — has the tightest curve on the railway and a small loop diameter that allows the locomotive to almost see its own tail. Loop 3 at Chunbhatti is the lowest remaining loop; Loops 1 (above Sukna) and 2 (at Rangtong) were destroyed by floods in 1991 and 1942 respectively and never rebuilt. The Batasia Loop, just below Ghum at 7,000 ft, encircles a memorial garden and is the route's most photographed feature, with Kanchenjunga rising on the horizon in clear conditions.

The 1882 regrade brought the line to a uniform 1 in 28 gradient (3.57%), one of the steepest sustained climbs for an adhesion-only railway anywhere in the world. There are no tunnels — the line wraps around every contour and crosses 5 major bridges and 498 minor bridges. The Tindharia railway workshops, established with the line, still rebuild B-Class steam locomotives over a century after they were first delivered from Sharp, Stewart & Co. in Manchester. A retrofit of B787 to oil-firing in 2002 (mirroring the Nilgiri Mountain Railway's No. 37395 conversion) was unsuccessful and the locomotive was eventually returned to cosmetic display at Siliguri Junction.

Daily diesel services use six NDM-6 hood-unit locomotives built at the Indian Railways Diesel Locomotive Works in 1997, all rated for 610 mm gauge and dressed in NFR maroon. Three additional NDM-6 units, built at the NFR workshop at New Bongaigaon at a cost of about ₹15 crore, were scheduled to enter service in 2025 to increase departure frequencies on the line.

October through early June is the strongest window. Post-monsoon (October–November) is ideal: skies clear, Kanchenjunga is reliably visible from Batasia Loop, and the tea gardens around Kurseong remain green from the late rains. December–February brings cold air, occasional frost at Ghum, and the lowest visitor numbers; pack for sub-zero overnight temperatures on the upper section even when Darjeeling town is in single digits Celsius. March to May is the second peak: warm days, blooming rhododendrons through the Sonada–Ghum forest belt, and the steam-hauled Red Panda service running at full timetable.

The monsoon (mid-June to mid-September) is the period to avoid. Heavy rainfall regularly triggers landslides on the Pagla Jhora–Tindharia stretch and along Hill Cart Road. Through-services were suspended in 2010–13, 2017, 2022 and again from July to November 2024 by landslide damage. Tourist joyrides Darjeeling–Ghum often continue during monsoon since the upper section is more stable, but check IRCTC for cancellations the day before travel.

Reserve well ahead — particularly for the Vistadome and AC Chair Car coaches in season. The official channels are the IRCTC website (www.irctc.co.in/nget) and any Passenger Reservation System counter across Indian Railways; tickets are issued under journey-specific train numbers 52541/52540 (NJP–Darjeeling) and separate joyride numbers for the Darjeeling–Ghum special. The DHR runs at 'walking pace' for hours at a time, so dress in layers and bring water — there is no onboard catering on the regular trains, only the Vistadome's mini-pantry. Toilets are spartan.

For photographers: the eastern side of the train (right going up, left going down) faces the deepest valley views between Tindharia and Kurseong. At Batasia Loop, alight quickly during the 10-minute halt and shoot from the upper terrace beside the war memorial. At Ghum, the 25-minute halt is enough for the DHR Museum but not for both museum and outside footage of the locomotive run-around — pick one. Children under five travel free on most fare classes but still need a reservation issued at the counter.