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Captian Robert Gray discovered the columbia river with John Kendrick on a fur trading expodition.
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Meriwether Lewis, William Clark and the corps of discovery began thier expodition to the land of the unknown.
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Lewis and Clark reached their destination what is now Washington St.
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In 1840 Charles Wilkes went on the interdisciplinary expedition. (1838–1842)
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''Oregon'' --the Pacific Northwes becomes a U.S. territory.
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War between the U.S. and the Yakima indians contiue.
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1858: The first Northwest railroad, the Cascade Railroad Company, begins operation in the Columbia River Gorge. The Walla Walla and Columbia River Railroad became the second Northwest railroad in 1873, and a large number of local railroads subsequently spring up in the 1880s.
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Oregon joins the Unioin as a free stae