Lewis and Clark Timeline By 20ELWOFF Apr 30, 1803 Louisiana Purchase Signed Period: Apr 30, 1803 to Sep 23, 1806 Lewis and Clark Expidition Nov 1, 1804 Sacagewea Joined the Corps of Discovery Dec 24, 1804 Fort Mandan Finished Feb 11, 1805 Sacagawea's Baby Was Born Apr 17, 1805 Lewis and Clark Sent a Keelboat With 20 Men and Discoveries to Thomas Jefferson Jun 13, 1805 The Great Falls Were Found Aug 1, 1805 The Corps of Discovery Crossed the Rocky Mountians Aug 17, 1805 Sacagawea Found Out That Her Brother Was Still Alive Jan 1, 1806 Fort Clatsop Was Finished Sep 23, 1806 The Corps of Discovery Returned to St. Louis
