The Lost River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map , accessed June 8, 2011 watercourse in the Thief River watershed of western Minnesota in the United States. The stream is entirely in Marshall County, and it flows into the Agassiz National Wildlife Refuge, where it disappears into the large wetland complex surrounding Agassiz Pool, a lake which drains to the Thief River.
See also List of rivers of Minnesota
References
Minnesota Watersheds
USGS Hydrologic Unit Map - State of Minnesota (1974)