The Little Union River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map , accessed February 3, 2012 river in Porcupine Mountains Wilderness State Park on the Upper Peninsula of Michigan in the United States. It is a tributary of the Union River, which flows to Lake Superior.
See also List of rivers of Michigan
References
Michigan Streamflow Data from the USGS