Sacajawea State Park is a public recreation area and historical preserve in Pasco, Washington, covering 267 acre at the confluence of the Snake and Columbia rivers, where the Lewis and Clark Expedition camped on October 16, 1805. It bears the name of the Shoshone woman Sacagawea, an active member of the expedition who was married to expedition member Toussaint Charbonneau, a French-Canadian interpreter and explorer. The park's Sacajawea Interpretive Center features exhibits about her and the Lewis and Clark Expedition.