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Flathead River
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Flathead River

river, North America
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

Flathead River, river rising in the MacDonald Range in southeastern British Columbia, Can., and flowing south for 240 miles (385 km) across the Canada–United States boundary into Montana. After passing between the Whitefish Range (west) and Glacier National Park and the Lewis Range (east), it enters Flathead Lake and emerges from the lake to join the Clark Fork near Paradise, Mont. Its chief tributaries are the Middle Fork, which rises near the Continental Divide and...

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