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The Corps of Discovery mapped rivers and mountain passes to the Pacific in 1804. The figure is taken from Library of Congress, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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The Lewis and Clark expedition explored the American West

The Corps of Discovery mapped rivers and mountain passes to the Pacific in 1804

Commissioned by President Thomas Jefferson after the Louisiana Purchase, Meriwether Lewis and William Clark led an exploratory expedition from Saint Louis to the Pacific coast between 1804 and 1806. Guided by Sacagawea, they mapped uncharted rivers, documented hundreds of plant and animal species, and established relations with Native tribes.

Map of Lewis and Clark's Track, Across the Western Portion of North America, published 1814 — Wikimedia Commons contributor · Public domain · source

Where this comes from

Library of Congress

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Tags: lewis and clark, exploration, american history

The Lewis and Clark expedition explored the American West: the short answers

Where does this come from, and can I check it?: The Corps of Discovery mapped rivers and mountain passes to the Pacific in 1804. The figure is taken from Library of Congress, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a history fact?: Yes. It sits on the History shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.