Belle Fourche(bĕl fo͞osh), river, c.290 mi (470 km) long, rising in NE Wyo., flowing NE and then E to the Cheyenne River in W S.Dak. The Belle Fourche project provides flood control and recreation facilities as well as irrigating c.57,000 acres (23,070 hectares) in South Dakota. Devils Tower National MonumentDevils Tower National Monument,
1,347 acres (546 hectares), overlooking the Belle Fourche River, NE Wyo.; it was the first designated U.S. national monument (1906). Devils Tower, 865 ft (264 m) high and narrowing in width from 1,000 ft (305 m) at its base to 250 ft (76 m) at its
..... Click the link for more information. overlooks the Belle Fourche River in Wyoming.
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