Motorcycle loop is fun. Really technical stuff is not marked. This is New England riding at its finest. The rocks, rock gardens, climbs, etc. will give the most experienced rider a challenge. There is also fast and fun winding stuff through the trees.
Place can get kind of wet in the winter.
Just get a road map of the town and you'll find the forest rangers office on it. Lots of Fire roads, and tons of singletrack. If you want some technical practice over more rocks than you've ever seen before go here. If you want to just squeze in a ride after work or while the wife shops etc. start off at the forest headquarters by the fire station and ride the marked loop this will give you 3-6 miles depending on what return loop you use. If you are looking for some challenge and bruises park on High Rock Road at the communications tower and ride any of the singletrack trails that are around there.