In the last two years all sorts of trails have popped up in these woods. Many of them are frequented by dirtbikers. Some are mild mannered and flat but if you find the right trail they are hairey with overturned logs, and some nice mud.
How to get there:
take 75th to Washington and take Washington South. Turn right at Ring Rd. and take the first left on knock knolls rd. The park is half a mile down on the left. The best trails are also easily accessable from Naperville rd. a block sw of where washington dead ends into it.