Danube Valley Railway
The Donauradweg (Danube Bicycle Trail), which also goes from Donaueschingen to Ulm, and continues on to Vienna, runs parallel to the line for much of the way. The Danube Valley Railway has a reputation as one of the most beautiful railways in Germany, and its charming course through the Upper Danube Nature Park ("Naturpark Obere Donau"), and the boom in bicycle tourism on the Donauradweg, have made the line especially popular with bicyclists and hikers. The railway traverses three districts of the state of Baden-Württemberg, as well as Ulm, which is not a constituent of a district, and is managed by three public transport associations "(Verkehrsbund)". In Ulm, as well as in the districts of Alb-Donau and Biberach, namely between the stations Ulm Hauptbahnhof and Riedlingen, the Danube Valley Railway is part of the Donau-Iller-Nahverkehrsverbund "(DING)" transport association. In the district of Sigmaringen, between Herbertingen and Sigmaringen, the railway is part of the "Verkehrsverbund Neckar-Alb-Donau" transport association "(naldo)".