Rapid Creek (South Dakota)
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Rapid Creek is a tributary of the Cheyenne River, approximately 86 mi (138 km) long, in South Dakota in the United States.
It rises in southwestern South Dakota, in the Black Hills National Forest in the Black Hills in Pennington County. It flows east, is joined by Castle Creek, past Silver City and through the Pacota Reservoir. Emerging from the Black Hills, it flows through Rapid City, past Farmingdale, and joins the Cheyenne approximately 13 mi (21 km) southwest of Wasta.