Mariazellerbahn

Within a few years of reaching Mariazell, the railway had more passengers than it could carry.

The narrow-gauge line from St. Pölten opened in stages, through the Pielach valley in 1898 and over the mountains in May 1907 to Mariazell, a pilgrimage town that was among the most visited places in Austria-Hungary. The steam engines built for the climb could not keep up. The crowds were so great that, for a time, the railway stopped advertising altogether. The answer it chose was one nobody had tried: Eduard Engelmann, the director of the provincial railway office, proposed running the whole line on alternating current, at a time when electric traction meant trams and light local lines. The plan was approved in December 1907, a power station was built for it in the gorge at Wienerbruck, and on 7 October 1911 electric trains took over. Steam had worked the mountain for less than five years.

Today the Mariazellerbahn runs 84 kilometres on a 760-millimetre gauge, from the state capital of Lower Austria to the Styrian pilgrimage town, through the gentle Pielach valley and then up, in loops, viaducts and tunnels, into the Ötscher-Tormäuer nature park. The highest point, 892 metres, lies inside the 2,369-metre Gösing tunnel.

Since 2013 the everyday trains have been the Himmelstreppe, the Stairway to Heaven: low-floor electric units built by Stadler. But on summer weekends the Ötscherbär still runs behind one of the 1911 locomotives, which the operator counts among the oldest narrow-gauge electric engines in the world, and on a few Sundays the steam engine Mh.6, built for the line in 1908, comes back to the climb it lost.

Trains leave from St. Pölten Hauptbahnhof, beside the main line from Vienna, and duck through two short tunnels to the Alpenbahnhof, the railway's depot and workshops. For the first hour the line is a country railway: it crosses farmland into the valley of the Pielach, the Dirndltal, named for the cornel cherries grown on its slopes, and calls at village after village on request. At Ober-Grafendorf the old engine shed, with its turntable, is home to the club that keeps the steam engine Mh.6.

The valley

Past Kirchberg an der Pielach the valley narrows until there is barely room for the river, the road and the track. The tunnels from here on were built for narrow-gauge stock only, which is why goods traffic on transporter wagons ended at Loich. Beyond Schwarzenbach the line leaves the Pielach for the gorge of the Nattersbach and reaches Laubenbachmühle, 535 metres up, where a modern operations centre now stands. Here the valley section ends and the mountain section begins.

The mountain

The line gains height in a long double loop above the Natters valley, across viaducts and through short tunnels, to Winterbach at 719 metres and Puchenstuben at 804. The gradient reaches 28 per mille only on two short stretches; the average is about 23, the figure the engines were built for. The line's summit, 892 metres, is inside the Gösing tunnel, 2,369 metres long and the longest on any Austrian narrow-gauge railway. Trains come out of it into Gösing station, where passengers get their first view of the Ötscher, 1,893 metres, across the valley.

From Gösing the line runs downhill along a steep wooded mountainside, over the Saugraben viaduct, the highest on the line, to Annaberg, and then round the reservoir that feeds the Wienerbruck power station. Between Wienerbruck and Erlaufklause, in a run of short tunnels, the train looks down into the Zinken, the rocky gorge of the Erlauf, the stretch usually counted the finest on the line. Soon after Mitterbach, the last stop in Lower Austria, the train crosses into Styria and stops at Mariazell, 849 metres up and some way outside the town centre; buses meet the trains for the short run into town. The line once continued 7 kilometres to Gußwerk; that section closed in 1988.

The trains

The everyday trains are the nine three-car Himmelstreppe units built by Stadler, which took over the whole timetable in October 2013. They are air-conditioned, step-free and take bicycles if booked. At weekends in summer, Panoramawagen coaches with wooden tables and large windows run with them, serving breakfast, ordered in advance, on the way up. The Ötscherbär is a heritage train of old coaches, a buffet car, a play car for children and, in summer, an open observation car, hauled by one of the electric locomotives of 1911, rebodied from 1960 and known as class 1099. And on a handful of Sundays the Mh.6 takes a train of old coaches, a dining car and a first-class saloon all the way to Mariazell.

The Mariazellerbahn runs every day, all year. The Himmelstreppe trains take 2 hours 16 minutes from end to end, and most of the day there is a through train about every hour, with gaps around midday. Many trains in the valley run only as far as Laubenbachmühle; the ones below go all the way.

Through trains, Monday to Friday

At weekends the same trains run, with an extra 09:37 up (arriving 11:53) and extra departures from Mariazell at 14:06 and 18:06, from 1 May to 1 November and from 21 November. From May to October a weekend express leaves St. Pölten at 08:05 and reaches Mariazell at 10:03, in under two hours.

The heritage trains

The Ötscherbär runs at weekends and on public holidays from 1 May to 1 November, and on Saturdays in Advent from 21 November 2026: St. Pölten 08:42, Mariazell 11:23; back from Mariazell at 15:21, in St. Pölten at 17:57. Seat reservations are strongly recommended.

The steam train with the Mh.6 runs on the second Sunday of each month from May to October (in 2026: 10 May, 14 June, 12 July, 9 August, 13 September and 11 October) and on the Sundays of Advent from 22 November: St. Pölten 09:02, Mariazell 12:23; back at 15:36, in St. Pölten at 18:57. On those Sundays it runs in place of the Ötscherbär.

Engineering work

From 2 to 20 November 2026 the whole line is closed for track work and buses replace the trains between St. Pölten and Mariazell.

Getting to St. Pölten

St. Pölten is on the main line west from Vienna. ÖBB trains from Wien Hauptbahnhof take about half an hour, and the operator's timetable shows a connection into every Mariazell train.

Times as of October 2026, from the Mariazellerbahn's 2026 timetable (opens in a new tab), valid until 12 December 2026, checked against ÖBB's journey planner.

The Himmelstreppe and the Ötscherbär are part of the regional transport network, so they cost the same: a single from St. Pölten to Mariazell is €22, and a day return, on which you can get on and off as often as you like, is €42.90. Tickets are sold online, at ÖBB ticket machines and counters, in the ÖBB and VOR apps, and on board at no extra charge, in cash or by card. Children under six travel free, two per adult; from six to fourteen they pay half.

The Panoramawagen and the steam train have their own fares, and breakfast in the Panoramawagen must be booked at least 24 hours ahead. An ÖBB Vorteilscard takes 40 % off the regular fares. Bicycles need a reservation: €5 for the whole line. Fares as of February 2026, read from the operator in October 2026.

Interrail and Eurail do not cover the Mariazellerbahn. It is listed by name among the Austrian lines the pass is not valid on, so pass holders buy an ordinary ticket from St. Pölten.

The KlimaTicket Österreich does. Austria's annual all-network ticket is valid on the Himmelstreppe and the Ötscherbär, as are the regional VOR KlimaTickets, and on the Panoramawagen a KlimaTicket holder pays only the upgrade. Holders of an ÖBB Vorteilscard get 40 % off. The steam train is sold at its own special fare.

An Interrail pass still pays for the train from Vienna or Linz to St. Pölten, but the Mariazellerbahn itself is a separate €22 ticket each way. For this trip alone a pass is not worth buying; it earns its keep only on a longer journey through Austria.

Checked October 2026 against Interrail's table of railway companies (opens in a new tab) and the Mariazellerbahn's fares page (opens in a new tab).

The line runs from a state capital to a shrine, and the best of the day lies in between: a valley of fruit orchards, a nature park whose gorges are reached only on foot, and a mountain and a lake on either side of the terminus. These six follow the train from St. Pölten to Mariazell.

Mariazell is the obvious place to stay, with the basilica a few minutes' walk away. For somewhere quieter, there is a hotel on the mountain section itself, at Winterbach.

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