Scenic Alpine Railways of Austria

Austria’s rugged geography served as the crucible for modern high-altitude rail engineering in Europe. In the mid-19th century, the Austrian Empire pioneered standard-gauge mountain railways, proving that steam traction could conquer steep alpine gradients without cables or atmospheric propulsion. Today, Austria operates an extraordinary variety of railway lines ranging from heavy high-speed alpine corridors to narrow-gauge heritage routes and steam cogwheel ascents.

1. The Semmering Railway (Semmeringbahn)

Constructed between 1848 and 1854 under the direction of pioneer engineer Carl von Ghega, the 41-kilometer Semmering Railway crosses the Semmering Pass between Gloggnitz in Lower Austria and Mürzzuschlag in Styria. Recognized in 1998 as the world’s first UNESCO World Heritage railway, it was the first standard-gauge mountain track in history.

Engineering Innovations: Ghega avoided iron bridges, constructing 16 massive arched stone viaducts (including the celebrated two-story Krausel-Klause and Kalte Rinne viaducts) and 15 tunnels totaling 4,200 meters. The line overcomes a 459-meter difference in elevation with gradients reaching 2.5% (1 in 40). Travelers riding the regular ÖBB Railjet services between Vienna and Graz traverse this historical alignment, taking in sweeping views of the Rax and Schneeberg peaks.

2. Schafbergbahn: The Vintage Cogwheel Ascent

Operating continuously since 1893 from the lakeside station of St. Wolfgang in Upper Austria, the Schafbergbahn is Austria’s steepest operational steam cogwheel railway. Utilizing the Abt double-rack system on a narrow 1,000 mm gauge, the line climbs 1,190 vertical meters across a 5.85-kilometer run to the summit station below the Schafbergspitze (1,783m).

The route achieves a maximum gradient of 26% (1 in 3.8), passing through alpine meadows and short rock tunnels. At the summit, passengers look down upon seven surrounding lakes of the Salzkammergut basin (including Wolfgangsee, Mondsee, and Attersee). The line still employs original 19th-century coal-fired steam locomotives alongside modern oil-fired low-emission steam units and diesel-electric tractors.

3. Mariazellerbahn: The 760mm Narrow-Gauge Pioneer

Connecting the provincial capital of St. Pölten with the pilgrimage center of Mariazell in Styria, the Mariazellerbahn spans 84 kilometers across the foothills and limestone gorges of the Lower Austrian Alps. Built to the Bosnian gauge (760 mm), the line was famously electrified in 1911, making it one of the earliest long-distance electric railways in the world.

The mountain section (Bergstrecke) begins after Laubenbachmühle, snaking through deep forested ravines, crossing stone viaducts, and traversing 21 tunnels before arriving at the Gösing viewing point facing the Ötscher peak. Today, the line is operated by the modern low-floor Himmelstreppe ("Stairway to Heaven") trainsets, complete with first-class panoramic cars featuring large overhead glass ceilings.

4. The Arlberg Railway (Arlbergbahn)

Completed in 1884, the Arlberg Railway links Innsbruck with Bludenz, breaching the Arlberg massif between Tyrol and Vorarlberg. The centerpiece of the line is the 10.6-kilometer Arlberg Tunnel, which was the third-longest rail tunnel in the world at the time of its completion.

The eastern ascent from Landeck climbs dramatically above the Trisanna Gorge, crossing the breathtaking 211-meter-long Trisanna Viaduct beside Schloss Wiesberg. The line serves as the primary trans-Alpine rail conduit connecting Vienna to Zurich, carrying international EuroCity and Nightjet trainsets across heavy winter snow conditions.

Key Scenic Railway Technical Specifications