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The Nilgiri Mountain Railway

foundin_a_attic, via Wikimedia Commons (CC BY 2.0)

Attraction · Ooty

The Nilgiri Mountain Railway

A metre-gauge rack railway working since 1899, climbing 1,900 metres out of the plains on the steepest track in Asia — and still doing it the original way.

Time neededHalf a day
Best timeMorning ascent
Opened1899
StatusUNESCO World Heritage
About

The steepest rack line in Asia, still worked

The line runs from Mettupalayam on the plains up through Coonoor to Udhagamandalam, and it has been working since 1899. The lower section is the reason it matters: an Abt rack system, in which a toothed rail laid between the running rails is engaged by pinions under the locomotive, because the gradient is far too steep for adhesion alone. It climbs roughly 1,900 metres, through sixteen tunnels and across some 250 bridges, at a speed that makes the whole ascent take about five hours. It was inscribed by UNESCO in 2005 as part of the Mountain Railways of India. Steam still works the Mettupalayam–Coonoor rack section; above Coonoor the line is worked by diesel.

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What to See

What to look at

The lower half and the upper half are two different railways.

⚙️ The rack section

  • Mettupalayam to Coonoor, on the Abt rack, behind a steam locomotive pushing from the rear
  • The gradient and the toothed centre rail are visible from the window on the curves

🚂 Coonoor to Ooty

  • Adhesion working and diesel haulage, through tea country and the Nilgiri downs
  • Shorter, easier to fit into a day, and the section most visitors actually ride

🌉 The engineering

  • Sixteen tunnels and around 250 bridges, most of them original

🍃 The line-side

  • Tea estates around Coonoor, and eucalyptus and shola as the line climbs
Getting There

Getting there

Which end you start from changes the trip.

🚂 The full run

  • Mettupalayam to Udhagamandalam takes about five hours going up and is faster coming down
  • One train a day works the full line in each direction, which is the constraint everything else fits around

🎟️ The short version

  • Ooty to Coonoor and back is roughly an hour each way and several services run it

🎫 Booking

  • Seats are limited and go early in season; this is not a train to arrive for on the day
Best Time

When to go

The morning train is the one, because there is only one each way on the full line.

🕰️ Time of day

  • The single daily ascent leaves Mettupalayam early; everything else on the line is arranged around it

📅 Season

  • The line closes in stretches during heavy monsoon when landslips take the track
  • Winter and the dry months are the reliable window

⏱️ How long

  • Half a day for the full ascent; two hours for the Ooty–Coonoor section
Visitor Intelligence

Worth knowing

It is slow, and that is the whole point of it rather than a fault to be endured.

🎫 Book ahead

  • Capacity is small and the full-line train runs once a day. In season it sells out well in advance

🪟 Which side

  • Views open on alternating sides as the line switches back; there is no single correct seat

🧥 Layers

  • You leave the plains warm and arrive at 2,200 metres cold, in the same afternoon

⛰️ Which section

  • If you only want the engineering, the rack below Coonoor is the section that matters
Nearby

Nearby

The Nilgiris.

Ooty Lake
In the town, below the station
Coonoor
The tea town halfway down the line
Ooty
The town guide
Good to Know

Frequently asked

One with a toothed rail laid between the running rails, engaged by pinions under the locomotive, so the train climbs by gearing rather than by friction. The Nilgiri line uses the Abt system on its lower section between Mettupalayam and Coonoor because the gradient there is far beyond what an ordinary adhesion railway could hold. It is the steepest such line in Asia.
On the rack section, yes. Steam locomotives work the climb from Mettupalayam to Coonoor, pushing from the rear rather than pulling. Above Coonoor the line to Udhagamandalam is diesel-worked. If steam is the reason you are going, it is the lower half of the line you need, and that is also the half with the engineering on it.
About five hours for the full ascent from Mettupalayam to Udhagamandalam, and rather less coming down. The Ooty to Coonoor section on its own is roughly an hour each way. Only one train works the full line in each direction daily, so the timetable is the thing an itinerary has to be built around rather than fitted into.
Yes, and well in advance in season. Capacity on the line is small, the full-line service runs once a day in each direction, and seats go early. Turning up at Mettupalayam on the morning hoping for a place is not a plan that works. The shorter Ooty–Coonoor services are easier but still fill on weekends and holidays.
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