The town of Plainfiled hosts one of the most enjoyable small terail networks in the area. Frenches Ledges and the abuting Farnum trails have over 8 miles of excellent singletrack trails.
The highpoint of the area is the top of Frenches Ledges itself which has a spectacular 360 degree view of the surrounding countryside.
While some of the main trails are marked, you'll discover many unmapped trails as you explore this area.
The trails are maintained by the Plainfield Trailblazers. A hard copy of the map can be purchased at Plainfield's Meridan Town Hall located at 110 Main St and all proceeds go towards improving the trails.
The best description of the trails is located on the Trail Finder website.
Also check the 3-D virtual tour or MTB Project to get an idea of the topography and climbing involved.