Corps of Discovery shoves off

From the Platte to the Vermilion (July 23-August 24, 1804)

Between the Vermilion and Teton Rivers (August 25-September 24, 1804)

To the Mandan Country (September 25-October 26, 1804)

Among the Mandans (October 27-December 27, 1804)

Leaving the Mandans (December 28, 1804-March 21, 1805)

To the Yellowstone (March 22-April 27, 1805)

From the Yellowstone to the Musselshell (April 28-May 19, 1805)

From the Musselshell to Maria's River (May 20-June 7, 1805)

Great Falls of the Missouri (June 8-June 20, 1805)

Portaging among the grizzly bears (June 21-July 14, 1805)

Three Forks of the Missouri (July 15-July 27, 1805)

Three Forks to Beaver's Head (July 28-August 10, 1805)

Reaching the Great Divide (August 11-August 16, 1805)

Across the Rocky Mountains (August 17-September 22, 1805)

Downstream toward the coast (September 23-November 1, 1805)

... And gazed at the Pacific! (November 2-December 10, 1805)

Ford Clatsop (December 12, 1805-March 17, 1806)

Return Journey begins (March 18-April 24, 1806)

Wallawallas and Nez Perceś (April 27-June 6, 1806)

Bitterroot Range (June 8-June 29, 1806)

Expedition divided: Lewis and the Indians (July 1-August 12, 1806)

Expedition divided: Clark in the Yellowstone (July 3-August 12, 1806)

Last lap (August 29-September 24, 1806)

Maps will be found on pages 29, 41, 97, 171, 263, 338.