250 Winter StKeystone, SD 57751 Phone: +1 605-666-4990Fax: +1 605-666-5305 Hotel E-mailHotel Website Classification 3 Superior Tourist Class Commission Rooms Rates 10% 33 $153-$300 (USD) Hoteliers! Is your information accurate? Update Here Keystone Boardwalk Inn & Suites Location & Neighborhood On Hwy 16A, center of town, 3 mi from Mt Rushmore - 30 MI, 40 min from Rapid City Regl airport. 21 MI from Rapid CityHotel Location: Tourist