The Eutingen im Gäu–Schiltach railway line (also called the Gäubahn in German—Gäu Railway) is a railway line in the German state of Baden-Württemberg that runs from the cultural landscape of the Gäu to the eastern edge of the Black Forest, connecting Eutingen and Schiltach via Freudenstadt. It is a section of the Gäu Railway from Stuttgart to Freudenstadt opened on 1 September 1879. The Gäu Railway was planned by railway engineer, Georg Morlok, and was characterised by viaducts and deep rock cuttings that were an architectural challenge to build.