Go deeper into the history of each park with scholarly articles and essays from Oxford University Press, freely available for the centennial year.
Lewis and Clark Expedition (1804–06)
US expedition to seek a route by water from the Mississippi to the Pacific Ocean. Instigated by President Thomas Jefferson, it was led by army officers Meriwether Lewis and William Clark, with the assistance of a Shoshone woman, Sacajawea. It reached the Pacific at the mouth of the Columbia River and produced valuable information about the country and peoples of the Northwest.