This trail is maintained by C.L.I.M.B. (Concerned Long Island Mountain Bikers) and as such has some fun features built in. If you stick to the blue square runs it should be pretty sedated but the black diamond loops add some fun hills, wooden features and small drop offs. Being on LI you don't feel very remote but it's definitely a nice change-up from Stillwell Woods.
From the L.I.E. take Exit 66 North. Cathedral Pines will be about 3 miles down the road on the left. If you pass a Lutheran church on your right you went too far. Once in the park gate turn immediately left and park. The trail head is at the far end of the parking lot.
http://www.singletracks.com/item.php?c=1&i=3067