I'm being accompanied by a friend who can only walk with me for 2 weeks. Any suggestion how far we can get and what would be the best point for her to join to Barcelona or any major city where she can take bus or plane to the czech republic?
Two weeks can get you to Burgos, or at least in between Burgos & Logrono. You can get buses & trains from both cities to Barcelona. If you are in between Burgos & Logrono, you can take a bus to either city. I suggest stopping at the Tourism office in Logrono for information on bus schedules.