The Denver and Rio Grande Western K-28 is a class of ten 3 ft (914 mm) gauge narrow gauge 2-8-2 "Mikado" type steam locomotives built in 1923 by the Schenectady Locomotive Works of the American Locomotive Company (ALCO) for the Denver & Rio Grande Railroad. They were the first new narrow gauge locomotives ordered by the railroad since 1903. They initially comprised class E-4-148-S, but were reclassified K-28 in 1924 when the railroad reorganized into the Denver & Rio Grande Western Railroad.