Hello. I moved back to NYC for a couple of months for work and have been seriously missing riding trails. So recently I've been doing a bit of exploring and have found a great network of trails which are all legal from what I've been told. I wrote about my exploration here :
Alpine and Rockleigh New Jersey Mountain Bike Trails
Would love to set up some group rides if anyone is interested. I didn't bring my mountain bike with me to NYC but I do have my Cyclocross bike set up with 40c tires and can keep up.
Best.