what is river rocks
The Rock River is a tributary of the Mississippi River, approximately 299 miles (481 km) long, in the U.S. states of Wisconsin and Illinois.The river was known as the Sinnissippi to Sauk and Fox Indians pushed west by white settlement; the name means rocky waters.he Rock River Water Trail is located on the river from its headwaters above the Horicon National Wildlife Refuge in south central Wisconsin to the confluence with the Mississippi River at the Quad Cities of Illinois and Iowa 330 miles downriver.