*River Miles [RM] are approximate, in statute miles, and were determined from USGS topo maps, obtained from NOAA nautical charts, or obtained from the U.S. Army Corps of Engineers website, 2003
- McArthur, L.A., and McArthur, L.L., 2003, Oregon Geographic Names, Oregon Historical Society Press;
- U.S. Bureau of Land Management General Land Office (GLO) Records database, 2007;
- U.S. Geological Survey, Geographic Names Information System (GNIS) database, 2007;
- Washington State University Libraries Archives website, 2007, "Early Washington Maps: A Digital Collection";
All Lewis and Clark quotations from Gary Moulton editions of the Lewis and Clark Journals, University of Nebraska Press, all attempts have been made to type the quotations exactly as in the Moulton editions, however typing errors introduced by this web author cannot be ruled out; location interpretation from variety of sources, including this website author.