Mostly off-road following bike trails along Dolina Bystrzycy (Bystrzyca Valley). Take the 10:00 947 bus from Grabiszyńska to the last stop in Samotwór then, to get back to Wrocław, get on the train in Pustków Żurawski. Try to catch the 13:27, it's the last one that is not crowded. We made it in just 3 under hours including a 15 minute coffee stop in Kąty Wrocławskie. Parts through the forest are awesome, but parts through the fields south of Kąty Wrocławskie kind of sucked: deep, uneven ruts or thick, wet grass for several kilometers. Next time I'm gonna try to pass around these somehow, not fun. Also, don't do this after rain, the mud will be epic. You need at least two sunny days with no rain to do this comfortably, but you will still likely walk your bike around some muddy parts. Mud never entirely disappears, so I heard. My wife managed on a non-suspension light hybrid with 700x32 mm Marathon tires, but had to walk more than I did with my 1.75" tires and front suspension. Anything narrower than that probably won't be much fun. Totally inappropriate for slick road tires.