Medium Size River Rock

The Rock River is a tributary of the Mississippi River, approximately 299 miles long, in the U.S. states of Wisconsin and Illinois. The river was known as the Sinnissippi to Sauk and Meskwaki peoples; the name means "rocky waters".
  • Country: United States
  • States: Wisconsin, Illinois
  • Length: 299 mi (481 km)
  • Progression: Rock River → Mississippi → Gulf of Mexico
  • GNIS ID: 416824
Data from: en.wikipedia.org