Keywords: Lewis and Clark Columbia River.jpg Detail of the Lewis Clark expedition map showing the Columbia River The Willamette River is identified as the Multnomah River The Snake River is Lewis's River Map_of_Lewis_and_Clark's_Track _Across_the_Western_Portion_of_North_America _published_1814 jpg 2008-05-31 21 47 UTC derivative work Northwest-historian PD-old original upload log This image is a derivative work of the following images Image Map_of_Lewis_and_Clark's_Track _Across_the_Western_Portion_of_North_America _published_1814 jpg licensed with PD-old 2006-01-06T20 10 08Z Brian0918 7000x3043 10674416 Bytes <nowiki>Author Lewis Meriwether ; Clark William ; Biddle Nicholas ; Allen Paul Date 1814 Short Title Map of Lewis and Clark's Track Across the Western Portion of North America Publisher Philadelphia Bradford and Insk</nowiki> Uploaded with derivativeFX 1810s Maps from the Lewis and Clark Expedition History of the United States Nicholas Biddle |