Illinois Route 100

Illinois Route 100 (abbreviated IL-100) is a 157 mile (251 km) highway in the southwest Illinois. It generally parallels the Illinois River. Starting in downtown Alton, it trends northward to Buckheart Township near Canton. It makes up much of the Illinois River Road, a U.S. National Scenic Byway. Illinois 100 is 159.09 miles (256.03 km) long.

Illinois Route 100

Illinois Route 100 (abbreviated IL-100) is a 157 mile (251 km) highway in the southwest Illinois. It generally parallels the Illinois River. Starting in downtown Alton, it trends northward to Buckheart Township near Canton. It makes up much of the Illinois River Road, a U.S. National Scenic Byway. Illinois 100 is 159.09 miles (256.03 km) long.