After 40 years of neglect the famous (infamous?) railway line from Pau to Canfranc is being renovated. At present the trains all stop at Oloron and a bus takes passengers across the border to Canfranc. But the French SNCF is in the process of testing the line as far as Bedous and a regular service will be inaugurated on 3 July 2016 (SNCF reservations are now possible).
Source: Vue sur les Pyrénées