1 Youth 1774-1792 19 -- 2 Planter 1792-1794 30 -- 3 Soldier 1794-1800 38 -- 4 Thomas Jefferson's America 1801 51 -- 5 President's Secretary 1801-1802 59 -- 6 Origins of the Expedition 1750-1802 68 -- 7 Preparing for the Expedition: January-June 1803 80 -- 8 Washington to Pittsburgh: June-August 1803 93 -- 9 Down the Ohio: September-November 1803 108 -- 10 Up the Mississippi to Winter Camp: November 1803-March 1804 121 -- 11 Ready to Depart: April-May 21, 1804 133 -- 12 Up the Missouri: May-July 1804 140 -- 13 Entering Indian Country: August 1804 152 -- 14 Encounter with the Sioux: September 1804 165 -- 15 To the Mandans: Fall 1804 176 -- 16 Winter at Fort Mandan: December 21, 1804-March 21, 1805 191 -- 17 Report from Fort Mandan: March 22-April 6, 1805 202 -- 18 From Fort Mandan to Marias River: April 7-June 2, 1805 211 -- 19 From Marias River to the Great Falls: June 3-June 20, 1805 230 -- 20 Great Portage: June 16-July 14, 1805 241 -- 21 Looking for the Shoshones: July 15-August 12, 1805 251 -- 22 Over the Continental Divide: August 13-August 31, 1805 268 -- 23 Lewis as Ethnographer: The Shoshones 284 -- 24 Over the Bitterroots: September 1-October 6, 1805 289 -- 25 Down the Columbia: October 8-December 7, 1805 302 -- 26 Fort Clatsop: December 8, 1805-March 23, 1806 318 -- 27 Lewis as Ethnographer: The Clatsops and the Chinooks 337 -- 28 Jefferson and the West: 1804-1806 342 -- 29 Return to the Nez Perce: March 23-June 9, 1806 353 -- 30 Lolo Trail: June 10-July 2, 1806 369 -- 31 Marias Exploration: July 3-July 28, 1806 379 -- 32 Last Leg: July 29-September 22, 1806 395 -- 33 Reporting to the President: September 23-December 31, 1806 406 -- 34 Washington: January-March 1807 422 -- 35 Philadelphia: April-July 1807 431 -- 36 Virginia: August 1806-March 1807 439 -- 37 St. Louis: March-December 1808 445 -- 38 St. Louis: January-August 1809 460 -- 39 Last Voyage: September 3-October 11, 1809 471 -- 40 Aftermath 476 -- Lewis and Clark Expedition 82 -- Up the Missouri 142 -- Headwaters of the Missouri 214 -- Crossing the Bitterroot Mountains 296 -- Exploring the Mouth of the Columbia 322 -- Traveler's Rest 382.
