| "Expedition Island was the starting, point for the two expeditions down the Green and Colorado Rivers led by Major John Wesley Powell in 1869 and 1871. On these expeditions Powell completed the exploration of the last, large, unknown, land area in the Continental United States. No conclusive information has been found to indicate the precise campsite or embarkation point of the first expedition, but the second camped on Expedition Island and left from there May 22, 1871." (National Register of Historic Places Web 2014) |
