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The first known explorers to cross the Rocky Mountains were Lewis and Clark in 1805, as part of their expedition to explore the newly acquired Louisiana Purchase. Later explorers, such as John C. Fremont and Jedediah Smith, also crossed the Rocky Mountains in the early 19th century.

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Q: What explorers crossed the rocky mountains?
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All pioneers heading west crossed these mountains?

the rocky mountains


Which three trails crossed the rocky mountains at south pass?

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What mountains did the Lewis and Clark Corps struggle through?

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Where three mountain ranges did the pioneers cross?

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