Flåmsbana

The Flåm Line drops 866 metres (2,841 ft) over its 20.2-kilometre (12.6 mi) route, making it the steepest standard-gauge adhesion railway in Europe. From Myrdal Station, perched at 866 m AMSL on the Bergen Line, the El 18 locomotives haul their renovated B3 carriages through a horseshoe loop into the Vatnahalsen Tunnel, then across an artificial cliff shelf where the valley falls hundreds of metres beneath the rails.

The gradient holds at 5.5 percent (1:18) for 16.1 km of the 20.2 km — speed is restricted to 40 km/h (25 mph) uphill and 30 km/h (19 mph) downhill, partly because the line lacks centralized traffic control and crossings at the Berekvam passing loop must still be coordinated by hand using flags by day and torches by night. The river Flåmselvi crosses under the railway tunnel at Høga, and at km 16.7 the train passes the 140-metre (460 ft) plunge of Rjoandefossen.

Flåm Station sits at 2 m above sea level on Aurlandsfjord, a branch of the UNESCO-listed Sognefjord and Nærøyfjord World Heritage system. The line carries roughly 547,000+ passengers a year and ranks third nationally for paid attractions, behind Holmenkollen and Bryggen.

The Flåmsbana is unique on three counts that no other scenic train delivers in combination: an 866 m vertical drop in 20.2 km of standard-gauge adhesion track (no rack rails, no cable assist) — a feat called 'one of the most daring engineering exploits in Norwegian history' by the operator; eighteen of its twenty tunnels were excavated by hand at a rate of 116 to 180 man-hours per metre between 1924 and 1940; and the five-minute photo stop at Kjosfossen waterfall (225 m total fall) where, in summer, costumed actresses perform the legend of the Huldra forest spirit on the rocks beside the train. Lonely Planet has named it among the world's most beautiful train rides.

Trains run daily year-round — four departures each direction off-season, nine to ten between May and September. Renovated B3 carriages have wide panorama windows and face two directions; the train reverses at end terminals. The Kjosfossen photo stop lasts about five minutes and platforms can be wet from waterfall spray. There is no on-board catering: pick up snacks at Café Rallaren in Myrdal (open summer) or at Flåm Station's restaurants. Loudspeakers narrate key landmarks in multiple languages; the journey takes 50–59 minutes downhill or 60–80 minutes uphill depending on traffic. Travel-sickness-prone passengers should sit on the right going down (left going up) for steadier views and less curve banking.

Engineering surveys started in 1893 with a proposed narrow-gauge rack railway. Parliament approved a standard-gauge electric line in 1923 after a decade of cost wrangling, and construction began in 1924 under engineer Peter Bernhard Kristian Lahlum. Eighteen of the twenty tunnels were drilled by hand — workers drilled up to 4.2 m holes through phyllite rock for dynamite blasting; two fatal accidents were recorded (1925 and 1938) and chronic silicosis from tunnel smoke shortened many careers. Track-laying ran 1936–1940, and freight service opened on 1 August 1940 followed by passenger trains on 10 February 1941. Electric El 9 locomotives, custom-built by Thune for the gradient, took over from steam on 25 November 1944. The line was nearly closed in the early 1990s for low revenue but was rescued by the privatization of operations to Flåm Utvikling in 1998, after which fares were raised, El 17 (later El 18) locomotives were introduced, and tourist demand quadrupled.

The longest of the twenty tunnels is the 1,341.5 m (4,401 ft) Nåli Tunnel; the Vatnahalsen Tunnel (880 m / 2,890 ft) emerges onto an artificial shelf cantilevered above a several-hundred-metre cliff. The minimum curve radius is 130 m (430 ft) — exceptional for standard gauge — and the maximum gradient of 5.5 percent (1:18) holds for 16.1 km of the 20.2 km line. The Berekvam passing loop is the only place trains can cross; it is unstaffed and lacks centralized traffic control, so manual flag/torch signalling persists. Electrification at 15 kV 16.7 Hz AC was introduced in 1944. The Kjosfossen power station, originally 1,700 kW (built 1944) and upgraded to 14,000 kW in 1969, supplies traction current.

May through September is peak season — nine to ten daily departures each direction, snowmelt waterfalls at full flow (Kjosfossen and Rjoandefossen most spectacular in late May to early July), green Flåmsdalen valley, and the costumed Huldra performance at Kjosfossen between June and August. October through April keeps four daily departures running, with snow-frosted scenery and dramatically fewer crowds; February to early April brings reliable cross-country ski conditions at Vatnahalsen and Myrdal. Avoid mid-July to mid-August if you dislike crowds — cruise-ship traffic at Flåm peaks then and trains may sell out days ahead.

Reserve in advance for the May–September season — sell-outs are routine. Buy round-trip via norwaysbest.com (Flåm-Myrdal-Flåm) or one-way to combine with the Bergen Line via the Norway in a Nutshell package. Eurail/Interrail passes get 30% off but only at staffed stations or Vy customer service, not online. The right-hand side facing downhill (left facing uphill) gives the better-value views including Kjosfossen and the cliff sections; switch sides if you ride round-trip. Bring a windproof layer for the Kjosfossen platform (waterfall spray reaches the train year-round). Bicycles need a separate ticket purchased on entur.no or vy.no — useful if you plan to descend the Rallarvegen historic construction road from Myrdal back to Flåm.