This system of trails has a unique history as it used to be Meadowdale International racetrack decades ago. The old racetrack has been restored to a sweet paved bike track but there is quite a bit of off road trails in and around the track. The terrain is pretty varied for Illinois which makes this worth riding. There are some steep descents straight down the fall line sometimes including jumps, there are some twisty trails through the woods and there are some longer stretches through meadows.
There are 2 places to park: off of Randall Road (31) North of Huntley Rd in a parking lot on the west side of 31. There will be a painted silo there. The other lot is off of Huntley Road west of Spring Hill mall on the north side of the street.
http://www.singletracks.com/item.php?c=1&i=4426