No special access issues
The parking lot is located right next to the 171. From the parking lot, cross the road right away, head left up along the road staying behind the barricades. Never cross the road again just keep following the road until you get to the entry of the composting site. Head up the small path with a yellow sign pointing to 'Geistbühlkapelle Zirl' after 30m behind the bench head right up a narrow path. This path will lead you right to the crag, it takes 15-20 minutes in total.