The trails used to be groomed a bit better and were more bike friendly up top, but have recently been repaired with large stone fill which is kind of annoying to ride over. Theres another section of the park other than the one on E. mountain road in Hillsborough. You get to it from Hopewell. Thats not a bad spot either. Both sides of the preserve are very rocky. I found my wheels needed to be trued after a weekend at this place.