Route Map Trace

Lewis and Clark Expedition Route Map — May 1804 (St. Louis MO) to November 1805 (Pacific Ocean at the Columbia River mouth) and return September 1806. Shows the Missouri River route west through Mandan/Hidatsa villages (winter 1804–1805 Fort Mandan), across the Rockies via the Lemhi Pass (Sacagawea's homeland), down the Clearwater/Snake/Columbia rivers, to the Pacific (winter 1805–1806 Fort Clatsop). Translucent overlay shows the Indigenous nations whose homelands the expedition traversed: Otoe-Missouria, Omaha, Lakota, Mandan, Hidatsa, Lemhi Shoshone, Salish, Nez Perce, Walla Walla, Yakama, Wishram, Chinook, Clatsop, Tillamook — ALL of which are sovereign nations TODAY. York's portrait (William Clark's enslaved African American attendant who made the whole journey) included in lower-right. Sacagawea's portrait, with infant Jean Baptiste, included in lower-left. Style: cartographic with overlay labels, four-perspective acknowledgment legend.