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Spring 1803
Meriwether Lewis begins his training as the expedition's leader in Philadelphia. -
The Corps of Discovery leaves Camp Wood and begins its journey up the Missouri River "under a gentle breeze."
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Sacagawea's son, Jean Baptiste Charbonneau—nicknamed Pompy by Clark—is born with assistance from Lewis.
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May 31, 1805
The Corps reaches the White Cliffs region of the Missouri River. -
May 16, 1805
One of their boats nearly overturns and Lewis credits Sacagawea with saving their most important possessions. -
June 13, 1805
Lewis reaches the Great Falls of the Missouri—five massive cascades around which the men must carry all of their gear, including the canoes. -
November 24, 1805
Having reached the Pacific, the entire expedition—including Sacagawea and Clark's slave, York—take a vote on where to build their winter quarters. They chose the Clatsop Indian side of the Columbia, and the encampment came to be called Fort Clatsop.
