The surface is mainly of compacted sand which is not consistently maintained, so this stage is more suitable for hybrid bikes.
Take care where you have to cross the D434 and D39 roads.
Railway stations - SNCF
Rennes train station (LGV and TER services) : on lines Paris/Rennes/St-Malo and Rennes/St-Malo/Dol de Bretagne/Pontorson/Caen
Regional TER train stations from Rennes to Redon : Rennes, Saint-Jacques-de-la-Lande, Ker-Lann, Bruz, Laillé, Guichen/Bourg-des-Comptes, Saint-Senoux/Pléchatel, Guipry-Messac.