Illinois 113 runs, like many of the routes in the 110's, in the northeast quarter of the state. It goes from IL47 between Morris and Mazon, east through the Coal City-Diamond area, to IL17 in Kankakee. It parallels the Kankakee River to the south from near Braidwood eastward to Kankakee.
Intersections from west to east:
IL113 begins in the west at IL47
I-55 near Braidwood
IL129 at Braidwood
IL53 just across the railroad tracks from IL129, at Braidwood
IL113 ends at IL17 at Kankakee.
It passes through these towns: Coal City, Diamond, Braidwood, Kankakee.
