The Lewis and Clark Expedition By facebooker_1400306374 Period: May 14, 1804 to Sep 23, 1806 The Expedition Begins and ends in St. Louis, MO Jul 4, 1804 First 4th of July Celebrated West of the Mississippi Aug 20, 1804 Only Fatality Occurs from Natural Causes Nov 4, 1804 Toussaint Charbonneau and Sacajawea join the expedition Feb 11, 1805 Sacagawea gives birth to baby boy, Jean Baptiste http://lewisclark.net/ Jul 13, 1805 Lewis and Clark reach the Great Falls of the Missouri Oct 16, 1805 The expedition reaches the Columbia River http://lewisclark.net/ Nov 24, 1805 The expedition reaches the Pacific Mar 26, 1806 The expedition leaves for home Jul 3, 1806 The expedition breaks into two groups Aug 12, 1806 Both Parties are Reunited downstream from the mouth of the Yellowstone River. Oct 11, 1809 Lewis Commits Suicide http://lewisclark.net/at Grinders Stand, an inn south of Nashville.