Can you cycle in the Pyrenees in winter ?

 Yes, depending on whereabouts you situate yourself . We get many warm days and lots of sun often more stable than the summer months. The inhibiting factor is if there is snow falling and low temperatures that make the roads icy.
As a general rule we would say that ,

 But are the mountain passes open ?
 Obviously not all are,up to ski resorts  there is not a problem. Otherwise depends on the altitude of the pass and its usefulness. We shall put up  details on the cols page