The Black Hills Central Railroad is a heritage railroad that operates in Keystone, South Dakota, United States. The railroad was added to the National Register of Historic Places on February 5, 2003. It currently operates the 1880 Train on the former Keystone Branch of the Burlington Northern Railroad (BN) between Hill City, South Dakota and Keystone, South Dakota. This railroad line was originally built by the Chicago, Burlington and Quincy Railroad (CB&Q) to serve mining and timber interests in the Black Hills. It reached Keystone on January 20, 1900 and was later used to haul equipment for carving nearby Mount Rushmore.