New Northwest

Clark's Final Map, 1814



Map Division, Library of Congress

illiam Clark began this map at Fort Clatsop during the winter of 1806. He continued to revise it for several years after his return, drawing upon new information from Zebulon Pike as well as from John Colter and George Drouillard, both veterans of the Expedition. The size of the original is 25-5/8 by 11-7/8 inches. Clark presented a more accurate picture of the Rocky Mountains than anyone had previously imagined, as may be seen in a comparison with the pre-expedition map drawn by Nicholas King.