Route 113 begins at a junction with Route 47 in
Grundy County north of Mazon. From here, the route heads east through a rural area before passing through
Coal City and
Diamond. At the eastern edge of Diamond, Route 113 meets
Interstate 55. Past this junction, the route turns southward, entering
Braidwood along Division Street. The highway turns east onto Main Street and intersects
Illinois Route 129 and
Illinois Route 53 at separate junctions. After leaving Braidwood to the east, Route 113 follows the southern bank of the Kankakee River;
Illinois Route 102 parallels this stretch of the route on the northern bank of the river. At
Custer Park, the route crosses the Wauponsee Glacial Trail. Past Custer Park, the route runs past
Kankakee River State Park. It then meets County Route 20, which crosses the river and connects Route 113 to Route 102. Past this junction, Route 113 enters
Kankakee County. The road continues to follow the river into
Kankakee, where it terminates at Route 17. == History ==