Each stage gives you directions to the next. Each of the first two stages is a pig. After that . . . beware of the wolf. 
All stages are in Neumann Park. The entrance on Neuman Drive is at N40 39.702 W089 32.198.
You do not need to enter Farm Park specifically, although if you have kids along and it is open for the season, you will have to check it out. You do not need to enter the McCammon Equestrian Center, Central Illinois Riding Academy.
Placed with permission from Fon du Lac Park District.
Link to CIGA Home Page