When I used to live in West Orange, I tried to ride South Mountain reservation and a local cop told me that I shouldn't, local cops would let you, but if you get cought by the county Sheriff, you will definitely be in trouble, the same goes for Mills Reservation and trust me, hikers in the area will report you to the Sheriff's department. You better off traveling to ride and that's the reason I moved out of West Orange, extremely high taxes and you don't have much freedom at the parks. I understand they very strict, and I did see a lot of wreckles people on the trails that would fly by hikers and the people who actually have a passion for mountain biking are the ones who pay