Belle Fourche
city, seat (1894) of Butte county, western South Dakota, U.S. It lies at the confluence of the Redwater and Belle Fourche rivers, near the Wyoming border, about 60 miles (100 km) northwest of Rapid City. The geographic centre of the United States (including Alaska and Hawaii) is some 20 miles (30 km) north of the city and is marked by a stone monument.
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