I love these trails, because there easy and fun, there built for speed and with it being mostly flat, speed is what you get. the whole facility is really nice and you can camp, cook out, swim whatever, they have trails maps at the office (great place to park and start) then hit the first trail, hard packed earth just to the north of the parking lot and get started, alot of jeep roads, single tracks and some technical spots with roots, be careful though winds can be fierce in southern nj taking down trees, although they do a great job of keeping the trails clear.... be on alert!
heres a link to the state website for more info
http://www.state.nj.us/dep/parksandforests/parks/belle.html
The forest can be reached via the Garden State Parkway by taking exit 17 southbound (exit 17) to Routes 9 and 550 or exit 13 northbound. Highway signs are provided to guide the motorist to the forest.
http://www.singletracks.com/item.php?c=1&i=3076