In reply to LP:
I have not been climbing there in many years, but the main climbing area in the Black forest is Battert, which is indeed a bit trad like.
The Teufelsfels near Gremmelsbach (a bit North from where you are) is supposedly better, as is Hornberger Platte (a newly developed area which has probably too many bolts).
For proper sport climbing near Freiburg the best area is probably Gueberschwihr across the border in Alsace (at least it was most popular 25 years ago when my wife lived in Freiburg).
CB