In 1895, Holsboer changed his company's name, Landquart-Davos Smalspurbahn, to the Rhaetian Railway (German: Rhätische Bahn, RhB) to reflect his plans for network expansion.

Landquart station is a major rail junction, where travelers from Zürich or St. Gallen, who want to travel to Prättigau, Davos or the Vereina Tunnel to the lower Engadin can change from the standard gauge Chur–Rorschach railway of the Swiss Federal Railways to the metre-gauge trains of the RhB.

The line leaves the shore of the Landquart to run to Malans station, but then returns to it and follows the river upstream as far as Klosters Platz.

After Serneus, the line passes just north of the award-winning Sunniberg Bridge,[2] which is the centerpiece of the Klosters bypass road that crosses the valley of the Landquart before entering the Gotschna Tunnel.

In addition, the zigzag section of the line to Davos, which makes a horseshoe turn after Klosters Platz, can be seen up the mountain.

It is also called the Maag Bridge after the clerk responsible for its construction at the Rigendinger engineering firm that built it.

The line then climbs through dense forests of larch and other coniferous trees to Davos Laret station.

A parliamentary initiative launched in 2008 to connect this line with the Arosa Railway is currently not considered a priority by the Grisons government in the light of tight financial resources.