The road commences at Brest docks passing the visitor attractions
Oceanopolis and Botanical Gardens. Thereafter the road turns south crossing the River Elom on a modern bridge the
Pont de l'Iroise. The older Pont A. Louppe now closed to vehicular traffic lies on the seaward side. The road passes the town of Plougastel Daoulas and alongside the coast (a series of submerged valleys) in the ''Parc Naturale D'Armorique''. The road passes the town of
Châteaulin and a junction with the
N164 to
Rennes and the
N12. The former route taken by the N165 is now numbered by the RD770. The road enters the town of
Quimper crossing the river Odet. The road now forms the towns eastern by-pass. The road continues south east with the old road now the RD783 to the south and after the town of
Quimperlé it becomes the RD765 where the road crosses the River Laïta. The road passes the Airport of Lann-Bihoué and forms the northern by-pass for
Lorient over the Rivers
Scorff and
Blavet past
Hennebont and a junction with the
N24 to Rennes. The old road continues as the RD765 through the town centre of Lorient and Hennebont rejoining the new road after
Landévant. The road continues south east to the town of
Vannes on the northern shore of the
Gulf of Morbihan. There is a junction with the
N166. The old road is again numbered the RD765 passing through villages now by-passed by the new road. The road by-passes the town of Muzillac and crosses the river Vilaine passing the town of La Roche Bernard. The former road is hereafter numbered the RD965. The road passes the town of Pontchateau at Savenay there is a junction with the
N171 to
La Baule and
Laval. The road passes the Loire-Atlantique motor racing circuit before entering the City of
Nantes becoming the
A844. == External links ==