Main article: 阿尔布拉铁路
The train leaves the city of Chur (585 m) in Graubünden and follows the course of the Rhine to Bonaduz (655 m). From there it enters the Domleschg Valley and follows the Posterior Rhine from Rhäzüns (658 m) to Thusis (697 m). The train continues toward Tiefencastel (851 m) following the Albula river and then crosses the Landwasser Viaduct before arriving at Filisur (1032 m). Shortly after Filisur the train passes its first spiral tunnel then continues to Bergün/Bravuogn. Between Bergün/Bravuogn (1373 m) and Preda (1789 m), at the end of the valley, the train has to achieve a difference in height of about 400 meters with an horizontal distance of 5 km without using rack-and-pinion, but with many spirals. Then the train enters the Albula Tunnel at 1,815 m under the Albula Pass. It emerges in the Val Bever, where it reaches Bever (1,708 m) on the Engadin plain. The train continues toward Samedan (1,721 m) and arrives at the St. Moritz station (1,775 m).
Main article: 贝尔尼纳铁路