Kniebis Pass

The B28's climb over the Kniebis links Oppenau in the Rench valley with Freudenstadt across the northern Black Forest crest, a beech-and-fir mountain road that pairs the tight serpentines of the Griesbacher Steige above Bad Griesbach with open plateau running up top.

From Oppenau the B28 runs up the Rench valley through Bad Peterstal-Griesbach, then attacks the crest as the Griesbacher Steige, a sequence of genuinely tight, low-visibility hairpins above Bad Griesbach that gain several hundred metres to the Kniebis village and the Alexanderschanze junction, where it meets the Schwarzwaldhochstrasse. From there it eases into faster, sweeping bends across the wooded plateau down into Freudenstadt. It is one of the older excursion roads in the region, busy at weekends with cars and motorcycles, and the Griesbach climb in particular rewards smooth, patient driving. Mind the very tight blind hairpins on the Griesbacher Steige, frequent oncoming bikes cutting the line, and damp shaded sections that stay greasy after rain.