The Sierra Menera mining railway began operating on July 27, 1907, transporting iron from the rich veins of the Ojos Negros Mines (Teruel) to the port of Sagunto. These deposits were located only 15 km from the broad-gauge railway run by Compañía del Ferrocarril Central de Aragón. Despite the short distance, due to Compañía del Central's high prices, the mining company decided to build its own railway line from the mines to the pier on the coast. This disproportionate decision resulted in the construction of a 205-km-long narrow-gauge line, most of which ran parallel to Central de Aragón's tracks.

Conceived solely to transport mineral, its existence was always conditioned by the mining area's level of activity and by demand. Its production was constantly increasing, especially after the Sagunto steel plant, Altos Hornos del Mediterráneo, started operating in the 1970s. However, there was such a large increase in transportation needs that the mining company realised that its railway line was a bottle neck limiting its possibilities of expansion. It therefore started negotiating with RENFE in order to transfer the transport of iron to this company.

The railway line was closed in 1972. RENFE made use of some of Sierra Menera's sections, at both ends of the line, for the traffic of its broad-gauge trains. Shortly thereafter, the tracks were removed and the viable rolling stock was reused by other national narrow-gauge railways. In 2002 it began to be upgraded as a greenway thanks to the involvement of many administrations, with the last section to Albalat del Tarongers being completed in 2020. Projects already underway for some time promise to extend the route to Sagunto, Puerto de Sagunto and, from there, to connect it with the city of Valencia.