Southwest of Chicago near Mendota, the Megacross area has a supercross track.
Megacross is located on the fairgrounds which are on the east side of Mendota on First Avenue. If coming from US39, follow SR34 and look for the brown signs to the fairgrounds. Turn south on First Avenue for 7 blocks to the north entrance of the fairgrounds.
Overall, Megacross is the 14th most popular dirt bike trail of all 25 dirt biking rides in Illinois.