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River, central Idaho, U.S. It flows northeast past the town of Salmon, where it is joined by the Lemhi River, and then northwest to join the Snake River south of the Idaho-Oregon-Washington border. It is about 420 mi (676 km) long. It is the largest tributary of the Snake and flows through an extensive wildlife area of national forests.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Salmon River, visit Britannica.com.
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