On its 8 hrs trip from Zermatt to St.Moritz the HGe 4/4 103 with Glacier Express is just about to reach its highest point of journey the Oberalp Pass with 2033 meters.
The Glacierexpress decends from the pass of Oberalp shorthly after the highest point of the pass, 2044 meters above sea level. This is mountain railroading with gear wheels.