The Motto River is an U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed April 1, 2011 river in Spotsylvania and Caroline counties in the U.S. state of Virginia. It is a tributary of the South River, and via the Mattaponi and York rivers is part of the Chesapeake Bay watershed.
See also List of rivers of Virginia
References
USGS Hydrologic Unit Map - State of Virginia (1974)