Rock Glen OHV Park
North main and Bypass 20, Rockford, IL.
The park has over 130 acres of both sandy track to woods with lots of trees. Not a lot of technical stuff, but enough to keep most people happy. They have a small motocross track for kids next to the parking area and a big track down in the middle of the lake they have there. Yes, they have a lake, which could be a blast in winter when it freezes totally. There is plenty of mud too, as when we were out there they had some rain and areas were very muddy, where other areas seemed to dry out pretty quick. The trails are marked one way, so you won't go head on to someone.
Pricing: Currently the cost is $20 per day with a one time purchase of a state sticker that is good for one year. Flags are required and are sold there.