Ithaca was selected as a top 5 place to live for mountain biking by Bike magazine in 2002. This is probably the best of the nearby state lands. Many miles of technical singletrack with a multitude of fellow riders on any nice day. Numerous man-made obstacles especially in Area 51. Trails are maintained by a local bike club working with DEC. Located in the Finger Lakes region of NYS plenty of wineries and microbrews to sample and Ithaca has a great scene in which to enjoy the night as well as great places to shop. Shindagin is probably the premiere place to bike in central NY.
Review: Great place for the cycle with your mtb! I cycled with my mtb for 3:30 hr through the blue (1,4,6) and red(3,5,6) trails and it was amazing, but you should pay attention to the marks because in some places it is difficult to keep track. I'll try to come back each week to enjoy, in this area there aren't many places to enjoy with your mtb.
You can view my activity in: https://www.strava.com/athletes/1182710
Review: Awesome, varied trail system with lots of worthwhile mileage. Blue trails are more technical and get sloppy after a rain, red and yellow trails are more flow and drain better. Top notch trail work by Cycle CNY; check their facebook for an up to date map. Most trails are marked, but the connections between them can be hard to spot. Almost all trails can (and should) be ridden in both directions.
Review: Rode this trail with my nephew. It was difficult to find the trail head. We stumbled across blue 5 and then blue 2. A little more searching found blue 1. It would be helpful to have a rough drawing of the trails.