The entrance to the gorge is right at the end of the Falkenschlucht MTB tour. You can't go any further by bike here, because now you have to walk. However, things get really serious in the gorge, the path is very steep, rocky and rooty up the gorge. Clip or flat pedal shoes are out of place here and you need proper hiking boots! You should definitely plan for this on your tour. It's very nice that you don't have to pay an entrance fee!!