Hey, dunno if you're still planning this trip. A few friends and I rode from Leon (spain) to Geneva last year bikepacking with a train across central France. We went through Castilla Leon, Asturias, Cantabria, Pais Vasco etc.
We spent a fair amount of time planning our route, I could give you some tips and share you our komoot files. The only thing is that we were bikepacking, aka riding MTBs majority offroad on singletrack. I dunno if thats what you are looking for.
Hey, dunno if you're still planning this trip. A few friends and I rode from Leon (spain) to Geneva last year bikepacking with a train across central France. We went through Castilla Leon, Asturias, Cantabria, Pais Vasco etc.
We spent a fair amount of time planning our route, I could give you some tips and share you our komoot files. The only thing is that we were bikepacking, aka riding MTBs majority offroad on singletrack. I dunno if thats what you are looking for.