Switzerland’s Scenic Mountain Trains

An engineering directory and practical field guide to the high-altitude rack railways, narrow-gauge alpine traverses, and historic cogwheels that conquer the Swiss Alps.

Alpine Network Metrics CHE-419.820

Maximum Elevation Reached 3,454 m (Jungfraujoch)

Steepest Cogwheel Gradient 48% (Pilatus-Locher)

UNESCO World Heritage Span 122 km (Albula / Bernina)

Primary Gauge Standards 1,000 mm Narrow Gauge

Primary Alpine Traverses & Summit Cogwheels

Technical profiles, track geometries, and operating parameters of Switzerland’s five landmark mountain railways.

291 km Total Distance

2,033 m Summit (Oberalp)

291 Bridges Crossed

8h 03m Transit Time

Glacier Express red panoramic train crossing Landwasser Viaduct in Graubunden

Glacier Express: Zermatt to St. Moritz

Known as the slowest express train in the world, linking Valais and Graubünden across the Rhine Gorge, the Furka base tunnel, and the Oberalp Pass.

Explore Route Profile →

2,253 m Ospizio Bernina

70 ‰ Adhesion Grade

1,824 m Altitude Drop

UNESCO World Heritage

Bernina Express passing over the circular Brusio Viaduct in Poschiavo

Bernina Express: Chur to Tirano

Crossing the Alps north to south without cogwheel assistance, from glaciers at Ospizio Bernina to palm trees in Italian Tirano via the Brusio Spiral.

Explore Route Profile →

3,089 m Terminus Height

200 ‰ Abt Rack Grade

1898 Year Electrified

33 min Ascent Duration

Gornergrat electric cogwheel railcar facing the Matterhorn pyramid

Gornergrat Railway: Matterhorn View

Europe’s first fully electric rack railway, scaling 1,469 vertical meters from Zermatt to an open-air ridge facing 29 peaks exceeding four thousand meters.

Explore Route Profile →

3,454 m Highest Station

7.3 km Tunnel Length

Strub Rack System

1912 Opening Year

Kleine Scheidegg depot with Jungfraubahn train ascending towards the Eiger North Face

Jungfraubahn: Top of Europe

Tunnels straight through the solid limestone and gneiss of the Eiger and Mönch massifs to terminate on the saddle of the Great Aletsch Glacier.

Explore Route Profile →

48% Maximum Incline

Locher Twin-Flange Rack

4.6 km Track Length

1,629 m Elevation Gain

Pilatus railway train climbing sheer granite cliffs above Lake Lucerne

Pilatus Bahn: Steepest Rack Railway

Operates with specially engineered horizontal gearwheels to prevent mechanical derailment on extreme 48 percent rockfaces rising from Alpnachstad.

Explore Route Profile →

Technical Principles of Swiss Alpine Traction

Why Swiss mountain rail lines withstand high vertical gradients, heavy seasonal snowpack, and seismic shifts without mechanical failure.

Rack Systems: Abt, Strub & Locher

Standard adhesion rail loses traction above 40 to 70 per mille (4% to 7%). To ascend steep gradients, Swiss engineers developed central toothed rack bars. Carl Roman Abt devised twin staggered bars for continuous tooth engagement, Emil Strub engineered inverted-V teeth with safety jaws, and Eduard Locher invented horizontal opposed gears for Pilatus to resist upward lift.

Rotary Snowplow Operations

High-altitude passes including the Bernina (2,253 m) and Oberalp (2,033 m) operate year-round. The Rhaetian Railway maintains heritage steam and modern diesel rotary snow blowers (Xrot) capable of clearing snowdrifts up to four meters deep to maintain uninterrupted schedule integrity.

Regenerative Dynamic Braking

On steep descents, electric railcars cannot rely solely on friction shoes without overheating brake blocks. Modern Stadler railsets use three-phase AC motors as generators during descent, feeding electrical energy back into the overhead catenary lines to power ascending trains elsewhere on the network.