The Keystone Boardwalk Inn and Suites welcomes you to Keystone and the heart of South Dakota’s Black Hills! Mount Rushmore National Memorial is located two miles away (Keystone is the closest town to the memorial). Our location on the boardwalk gives you flexibility and puts you right next to local shops. While in Keystone, be sure to visit all the quaint shops and many restaurants all with in walking distance of the motel.