The Roßberg is a mountain, 1,124.7 m above sea level (NHN),[1] in the Black Forest immediately north of Breitnau in the German state of Baden-Württemberg.

On the northwestern side of the mountain the remains of a rampart and ditch system from the end of the 17th century may be made out.

In the area of the Roßberg the fortifications (known as Schanzen) run from the Schanzenhäusle via the Ringelschanze to the zur Roßbergschanze.

Between the Ringelschanze and the Roßbergschanze there are continuous, linear structures with several triangular bastions.

In 1690 battles were fought at Breitnau, but by the early 18th century the fortifications had lost their military significance.