Pinnacle Country Club is an 18-hole private golf course in Milan, Illinois, built in 1961. It sits in the $$ (moderate) price range for golf in Illinois. The season runs Apr 1 to Nov 15 (closed on Mondays). Tee times can be booked 6 days in advance. Play is generally limited to members and their guests.
Details like fees and seasons change, so call the course before you head out.