The single railway track from Flåm to Myrdal Station is 12.6 miles long. The gradient is one of the steepest in the world (reaches 5.5%) as it climbs 2,841 feet to the terminus. Along the way you will cross a single bridge, pass ten stations and chug through 20 tunnels. Nåli Tunnel is the longest at 4,401 feet. The maximum speed of Flåmsbana is 25 m.p.h. When traveling downhill, the pace slows to 19 m.p.h. So, you have plenty of time to admire the clouds swirling above the mountains, the grand green valley and quaint farming communities.