1805-04-07Lewis and Clark Expedition leaves Fort Mandan (on the Missouri River near what is now Washburn, North Dakota), beginning their journey to the Pacific Ocean
1805-11-07Lewis and Clark Expedition first sights the Pacific Ocean at the mouth of the Columbia River
2001-01-17 President Clinton honors Lewis and Clark Expedition, posthumously raises William Clark's rank from Lieutenant to Captain, makes Honorary Sergeant Shoshone female guide Sacagawea, and York, enslaved by William Clark, who assisted expedition