The General Roca Railway (FCGR) (native name: Ferrocarril General Roca) is a 5 ft 6 in (1,676 mm) broad gauge railway in Argentina which runs from Constitución station in Buenos Aires to the south of the country through the provinces of Buenos Aires, La Pampa, Neuquén and Río Negro. It was also one of the six state-owned Argentine railway divisions formed after President Juan Perón's nationalisation of the railway network in 1948, being named after former president Julio Argentino Roca.