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The Corps leave from the starting place Camp Wood and start their journey to find undiscovered plants, animals and other thing of the Louisiana Purchase
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The expediton marks the first 4th of July ever celebrated west of the Mississippi River.
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The Corps meet the Oto Native Americans for the first time.who lived along the Missouri River near the present-day border of Missouri and Nebraska.
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The expedition holds a friendly council with Yankton Sioux at Calumet Bluff. Some 70 Yanktons journeyed to the Corps’ camp
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The Corps enters the Great Plains and sees animals unknown in the eastern United States.
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The crew meets with Sacagawea and she joins their expedition. She became an important role in the expedition.
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Sacagawea's son, Jean Baptiste Charbonneau—nicknamed Pompy by Clark—is born with assistance from Lewis.
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The expedition sets out for the Bitterroot Mountains with many horses and a mule from the Shoshone.
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The expedition reaches the Columbia River, the last waterway to the Pacific Ocean.
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Clark sees Mount Hood in the distance, proof that they are near to the Pacific Ocean.
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Lewis and Clark reach the Pacific ocean
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Lewis and Clark decide to split after passing over the Rocky Mts.
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They return back to St. Louis after 2 years, 4 months, and 10 days.
