^Source elevation derived from Google Earth search using GNIS source coordinates.
^ abcUnited States Geological Survey. "United States Topographic Map". TopoQuest. Retrieved January 29, 2013. River miles are marked and numbered on the relevant map quadrangles through river mile 29 (river kilometer 47).
^Clark, Lewis (October 30, 1805). "Lewis's Journal". Archived from the original on September 10, 2015. {{cite journal}}: Cite journal requires |journal= (help)