When I cycled my ‘Grand Tour’ around Europe back in 2022, I made use of several of the French named routes that have been developped by France Vélo Toursime in recent years; La Velomaritime, L’Avenue Verte, La Vélodyssée, La Via Rhôna plus a couple of others. They are generally excellent and a real effort has been made by the authorities across France to put infrastructure in place to make for easy route finding on predominantly off-road paths. Each of the routes has a dedicayed website with GPS tracks, tourist information and accommodation options etc…