The Alder River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map , accessed June 30, 2011 river in Maine. A tributary of the Androscoggin River, the Alder flows west from Locke Mills () to Bethel.
See also List of rivers of Maine
References
Maine Streamflow Data from the USGS Maine Watershed Data From Environmental Protection Agency