The Rock River is a significant waterway stretching approximately 325 miles from Fond du Lac County, Wisconsin, southward through Illinois before joining the Mississippi River at the Quad Cities. Flowing through diverse landscapes including agricultural areas and urban centers like Rockford, Dixon, Sterling/Rock Falls, and Rock Island, the river provides about 12,400 acres of aquatic habitat. The main channel averages 15 feet in depth, but can reach 50 feet deep between Dixon and Sterling. The river bottom consists primarily of bedrock with extensive gravel areas and some sections covered with mud or silt. With over 80 fish species present, the Rock River is renowned for its diverse fishery and stands as one of the premier fishing destinations in both Illinois and Wisconsin.