The McCormick-Stillman Railroad Park is home to Magma Arizona Railroad #6, a 2-6-0 Mogul type locomotive, originally built by Baldwin in 1907 as #26 for the Arizona & New Mexico Railway in Clifton, AZ. In January 1922, the locomotive was leased to the El Paso & Southwestern Railroad and renumbered #130. It was then sold to the Magma Arizona Railroad in December 1922 and was renumbered #6.
The Magma Arizona was built by the Magma Copper Company. Initially headquartered in Superior, AZ, it primarily hauled copper ore on 30 miles of track to and from the Southern Pacific mainline in Magma, AZ. Until the 1940s, when trucking became more economical, it also hauled cattle for local ranchers. Built as a 36” narrow gauge railway in 1915, conversion to standard gauge was just being completed when #6 arrived. It was retired in 1960 and was eventually sold to the Scottsdale Railway & Mechanical Society in 1977.
The Magma Arizona was the last railroad to end steam hauled revenue services in the continental United States: #5, a 2-8-0, made its last revenue run on 5th September 1967 and reverted to standby.