The area is access sensitive
From the parkspace, walk slightly uphill on the Ruhrhohenweg. You will pass a cemetery (Waldfriedhof) on your right. Turn left and after a few meters you will reach a big gate. Just before the big gate, turn right onto a small path and follow it till a 'viewpoint', by a big antenna. Turn left and follow the path. You will reach another gate. This one can be opened and closed, or you can go around. Make sure to close it properly. After a few meters you will reach the climbing area. The roof will be left, if you continue straight you will find the wall.
Do not litter or make unnecessary loud noises. Do not make fire.