This park is a favorite among many locals for its beautiful gorge scenery.  Carved stone steps lead up and down both sides of the gorge in steeper places.  Less travelled trails include the Red Pine trail north of the gorge, and the Finger Lakes Trail along the southern perimeter of the park.  Access to the park is by Route 327, which is a right turn from Route 13 as you're going south from Ithaca.  The lower parking area is just after turning onto 327, while the upper entrance is a few miles further.

Links for Robert Treman State Park:
http://ludlow.dns2go.com/cribbage/areas/treman/treman.html
http://www.priweb.org/ed/finger_lakes/treman.html
http://gowaterfalling.com/waterfalls/lucifer.shtml
http://images.beggerlybend.com/photos/gorges/eg/index.html
http://www.angelfire.com/ny4/waterfalls/treman.html
http://www.cayugalake.com/ithaca/treman.html
http://nysparks.state.ny.us/parks/info.asp?parkID=104

Map courtesy of Tompkins County GIS.

Heron nesting colony:
In late spring or summer 2003, while riding my bike along the southern perimeter of Treman, I heard an incredible commotion from the woods.  I went to investigate and found the cause to be an acrimonious domestic dispute involving a family of herons, or maybe a whole neighborhood of them.  Commotion would break out whenever a parent returned with food, or when a heron flew over to the wrong nest.  In 2004 and 2005 they were back again - each year there have been at least 20 to 30 nests, with numerous juveniles and adults in attendance.  There are great blue herons and also a smaller species (either green herons or black-crowned night herons).  The site is an evergreen forest with lots of downed trees (this gap is visible in the photo below).  It's not next to any ponds or streams, so the parents must commute to such places to fish.  If you'd like to visit the nesting colony, please tread quietly to avoid disturbing the birds (it's their home and you're the guest).  To get there, take Route 13 south from Ithaca, PAST Route 327 and the split with Route 34/96.  Once 13N and 13S Come back together as a two-way highway, you'll need to take the next right.  Here there are actually two roads splitting off to the right, and you need to take the sharp right onto Van Ostrand road (the gravel road that goes uphill from the intersection).  Then take a right on Thomas Road, which heads mainly north, then turns west.  When you get to the three-way intersection with Butternut Creek Road, turn right to stay on Thomas Road.  It's a dead end in this direction, but you don't want to drive far, stop about 50 yards after the intersection and walk west into the woods.  Look for the break in tree cover due to the downed trees, and the lush green undergrowth caused by sunlight coming in and an especially rich supply of nutrients from the birds.  If it's in the spring or summer, you can also listen for the sound of enraged squawking from the quarrelsome herons.  The approximate location of the heron nesting colony is indicated by the yellow star above.