Rock River, IL

The Rock River is a tributary of the Mississippi River, approximately 299 miles long, in the U.S. states of Wisconsin and Illinois.  In northern Rock County, Wisconsin, it receives the Yahara River, and flows southward through Janesville and Beloit into northern Illinois, where it receives the Pecatonica River 5 miles south of the state line.  It flows south through Rockford, then southwest across northwestern Illinois, picking up the Kishwaukee River, passing Oregon, Dixon, Sterling and Rock Falls before joining the Mississippi at Rock Island.  Recommended baits include wax worms, leeches, night crawlers, crayfish patterns, sucker minnows and gulp worms.