Elz Valley Railway

The Elz Valley Railway is a 19.3 km long, single-tracked, standard gauge branch line in the Black Forest area of the German state of Baden-Württemberg. The line branches off the Freiburg im Breisgau to Offenburg section of the Rhine Valley Railway at Denzlingen and runs up the valley of the River Elz to Waldkirch and Elzach.Whilst the track is owned by DB Netz AG, passenger services on the Elztalbahn are provided by the Breisgau S-Bahn, whose trains continue over the Upper Rhine Valley line to Freiburg Central Station. Typical service is two trains per hour from Freiburg to Waldkirch, with one train continuing to Elzach.

Source: Wikipedia