I rated this trail a 3 for technical rating because if you only ride the singletrack it's pretty easy with some steep ups and downs, log piles and tight turns. But if you choose to be more daring there are other treats along the trail like log rides, skinny bridges, dirt jumps, gaps and drops. I work with others to keep this trail free of erosion, fallen trees and general overgrowth, even during the summer monthswhen weeds usually get nasty so it's always fun to ride.
In Manhattan, take Hwy 24 east out of the city, make a right turn before the Big Blue river bridge to the parking lot. Ride the sidewalk going south under the RR bridge and the trail starts on the left going into the trees.
http://www.singletracks.com/item.php?c=1&i=1078