The Santander to Alar del Rey Railway Line in Alar del Rey, Spain

Whilst heritage railways  are fairly frequent entries in Atlas Obscura rail lines that are still operating commercially are much rarer but not unknown. This, Iberian standard gauge, line is actually the  the northern section, through the Cantabrian Mountains, in Spain, of a line which actually runs south as far as Palencia , which is northwest of Madrid. It is remarkable   for its spectacular  scenery, its marvellous railroad engineering and its historic  value. Starting in the north, the line runs from Santander  rail station, in Cantabria, quickly running out through the suburbs then is very soon into the mountains. The impressive mountain scenery (and much of the engineering difficulty) changes to much less interesting surroundings about 84 miles of track later as it enters the Meseta Central plains around Alar del Rey. It was constructed  in  the mid 19th century, with the section between Santander and Alar del Rey being opened in 1866. .

 Travelling south on this, now fully electrified, line through some remarkable scenery one soon reaches the famous Rampe de Bárcena  section of track. This is one of the most remarkable  feats of railway engineering  on any adhesion  line in the world. Between Bárcena de Pie de Concha and Reinosa the line rises 560 metres over a distance of 21km but the Pesquera–Bárcena section has a height difference of 319 meters over only 7 km . The route is considered to be  a, very rare, "triple horseshoe" and just looking at the plan on a map is very impressive. The convoluted route, involving three long and seriously curved tunnels was designed by English engineer Alfred S Gee as an alternative to the proposal of using wire hauled inclines on the steepest parts of the route by his Spanish competitor, Juan Rafo. Gee proposed maximum gradients  requiring more powerful locomotives than originally intended. Of these some 14  2-4-0 steam locomotives were produced by Isaac Dodds and Son (of Rotherham, England) and , famously, were never paid for. In thinking about the Rampe we need to remember that the main aim was to take full waggons of wheat to the port, essentially a down hill trip, and the documents of the time often refer to the Rampe as a "descent". Presumably hauling empty waggons back up was considered less of a problem. In any event electrification of the line in 1951 provided all the power needed.

The scenery around the "Rampe" is magnificent  and alighting at stations along the line deposit you in the heart of the magnificent  Cantabrian  mountains. You will also cross over the stunning Viaducto de Celada Marlantes, at the time of building, the largest viaduct in Spain and still beautiful, if less impressive in a modern context. If road viaducts are your thing the line passes close to the highest road viaduct in Spain at Montabliz.  Passing onwards south  between Aguilar de Campoo and Mave  the line passes through the natural grandeur of the  Cañjón dela Hoadada with its massive  cliffs reaching up to the, archaeologically important, Las Loras and Las Tuerces mountains to the left and right.

It is worth a stop off at Mave here to see the magnificent  church  attached to the Convento de Santa Maria  just 50 feet from the station. South from Mave  to Alar del Rey the scenery changes as mountains give way to the wide open arable land of the northern part of the  Meseta Central.  At Alar del Rey, of greatest historic  interest,  is the Canal de Castilla  which originates in the town. The southward route of the railway and canal are very close.  It was the building of this railway which terminated all ambitions to continue the canal north to the port of Santander and eventually caused the demise of the canal as a commercial navigation leaving it to serve as an important water supply channel and now very much a tourist attraction.

Overall a magnificent rail journey taking in both natural grandeur and some of the most significant civil engineering feats of the time. There may only be a few more years to experience it as the spectre of a new, high speed , line is looming.