From the Parc des expositions in Vannes, the route runs through Sulniac, Questembert and Rochefort-en-Terre to Redon, then into Loire-Atlantique through Guémené-Penfao and Nozay before it finishes in Angers.
Prudhomme pointed to a long straight road at the start of the final 50 km as a place where teams may begin to maneuver for position, and the finish in Angers rises on a false flat.
Angers last hosted a stage finish in 2016, when Mark Cavendish won the sprint on stage 3 from Granville. France 3 counts this as the 13th time Vannes has hosted a stage. The first time trial of the Tour follows the next day: Blois to Chambord.