Gray Line of the Black Hills is located in Rapid City, S.D., the gateway to Mount Rushmore and the Black Hills of South Dakota. Gray Line offers outbound package tours. The company is locally owned with 50 years experience in ground transportation, sightseeing services and package tours. It specializes in receptive services and customized tours. It offers group charters year round, customized trips, narrated sightseeing tours, luxury motor coaches, wash bay and mechanical services. Its services also include group trips, business trips, shuttling and airport transfers.