Shindagin Hollow is a good-sized state forest with an extensive network of trails.  Purple on the map below indicates the Finger Lakes Trail; other trails are marked in gray.  Shindagin is good for hiking but especially famous among mountain bikers.  To get there from Route 79 at Slaterville, take a right on Boiceville Road, then left on Central Chapel Road.  At the fork you can take either Shindagin Hollow Road (left) or Braley Hill Road (right) right into the forest.

Links for Shindagin Hollow State Forest:
http://ludlow.dns2go.com/cribbage/areas/shindagin/shindagin.html
http://www.bikerag.com/images/MAPS/ny_shindagin_review.htm

Map courtesy of Tompkins County GIS