Rapid City is the second-largest city in the state of South Dakota, and the county seat of Pennington County. Named after Rapid Creek on which the city is established, it is set against the eastern slope of the Black Hills mountain range. The population was 67,956 as of the 2010 Census. Rapid City is known as the "Gateway to the Black Hills" and the "City of Presidents". The city is divided by a mountain range that splits the western and eastern parts of the city into two.
- Nitro - August 10, 1998.