tributaries to the river Wupper (from source to mouth): Left: Gaulbach, Brunsbach, Pixwaager Bach, Dörpe, Wilhelmstaler Bach, Hardtbach, Lohbach, Nöllenberger...

Hardtbach may refer to: Hardtbach (Rhine), a river of North Rhine-Westphalia, Germany, left tributary of the Rhine Hardtbach, a small river of North Rhine-Westphalia...

Aa Hammer Bach Hanfbach Hardenberger Bach Hardtbach, tributary of the Rhine Hardtbach, tributary of the Wupper Harlebach Hartmecke Haßbach Hasselbach, tributary...