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Black Hills Steam - Mallets on the Black Hills Central19,077 views Aug 7, 2026 KEYSTONE STATIONIn the Black Hills of South Dakota near Mt Rushmore, we find the oldest continuously operating standard gauge excursion railroad in the US. A pair of Mallet 2-6-6-2T steam locomotives power this popular train over the former CB&Q's Keystone Branch. We visited in July of 2026 and were able to catch both Mallet locomotives in action: the 108 and the 110.The Black Hills Central Railroad, a historic excursion line featuring rare Baldwin 2662T Mallet steam locomotives. The journey traverses steep mountain grades and rugged terrain between Hill City and Keystone, providing a scenic look at authentic steam railroading near Mount Rushmore.https://www.youtube.com/watch?v=kiQBt_L6u1k