The Rhaetian Railway, abbreviated RhB, is a Swiss transport company that owns the largest network of all private railway operators in Switzerland. The RhB operates all the railway lines of the Swiss canton of Graubünden/Grisons, except for the line from Sargans to the cantonal capital, Chur, which are operated by the Swiss Federal Railways, and the line from Disentis/Mustér to the Oberalp Pass, and further on to Andermatt, Uri, which is operated by Matterhorn Gotthard Bahn. Inaugurated in 1888 and expanded from 1896 onwards in various sections, the RhB network is located almost entirely within Graubünden, with one station across the Italian border at Tirano.
The Rhaetian Railway serves a number of major tourist destinations, such as St Moritz and Davos. One of the RhB lines, the Bernina Railway, crosses the Bernina Pass at 2,253 metres above sea level and runs down to Tirano, Lombardy in Italy.