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River, Wyoming and Montana, U.S. Formed by the confluence of the Popo Agie and Wind rivers in west-central Wyoming, it flows north 336 mi (541 km) into the Yellowstone River in southeastern Montana. The Little Bighorn joins the main stream at Hardin, Mont. The Bighorn Canyon National Recreation Area stretches along the Montana-Wyoming border. See also Battle of the Little Bighorn.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Bighorn River, visit Britannica.com.
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