The Rock River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed January 3, 2012 river in Alger County on the Upper Peninsula of Michigan in the United States. It flows through the Rock River Canyon Wilderness of Hiawatha National Forest, then turns north and flows to Lake Superior at the village of Rock River.
See also List of rivers of Michigan
References
Michigan Streamflow Data from the USGS