I was on the summit of the Rothenbachkopf in June 2009 ! The ascent was made by the crests road (Rothenbach house). It's steep, but easy enough. Extraordinary panorama on the summit ! Very nice breakfast and pause place ! Great !!!
Did most of the mountains in this region in a 3 day hike. Not hard and quite nice but windy.
Nice climb from Mittlach over Herrenberg, Batteriekopf and down over Rainkopf and Altenweier.