It took a lot of driving around and headache before we were finally able to find a spot without any hassle. We ran into a lot of people that were sent to kick us out of where we were riding, yet everybody seemed to be more interested in what we were doing rather than upset. We had a lot more trouble finding a spot then we thought we would when we first set out. It was hard to find a spot that had low drive by traffic, a clear coast to walk around, non toxic, clear of rocks and logs, where nobody would care about the construction of a rail, and enough depth to not die when you crash. Other than driving around searching, you could try a program from Google called Google Earth. It works really well and is a good tool. Good Luck.
We cant seem to talk any of our friends into trying any of this so we are always looking for people to ride with. If your ever around Richmond, VA and trying to ride, hit us up on the the low.