The Portet-Saint-Simon – Puigcerdà railway is a secondary railway line in southwestern France. It connects Portet-sur-Garonne 11 km south of Toulouse on the Toulouse–Bayonne railway to Latour-de-Carol and Puigcerdà towns located on each side of the French/Spanish border in Cerdanya. The railway was opened in several stages between 1861 and 1929.Since the closure of the railway from Pau to Huesca via Canfranc in 1970 it is the only railway crossing the Pyrenees main chain.
