The municipality of Obergoms occupies the uppermost reaches of the valley of the Rhone, extending up to and including the Rhone glacier that feeds the river. It is surrounded on all but its downstream boundary by high mountains, and forms the junction of routes over the Grimsel, Furka, Nufenen and the Gries Passes, as well as the lower level route down the Rhone valley towards Brig. With the exception of the Gries Pass, which is traversed only by a track, all these passes carry paved roads. The Furka-Oberalp railway line also passes through the municipality, with its current route entering the western portal of the Furka Base Tunnel at Oberwald, whilst its earlier route, now preserved as a heritage railway, passes over the Furka Pass.