Boulogne (river)
The river Boulogne is located in the west of France in the départements Loire-Atlantique, and Vendée.
It is 82 km in length and flows north from the source near Saint-Martin-des-Noyers, through Les Essarts and La Merlatière, then through Boulogne, Vendée and Les Lucs-sur-Boulogne into the Lac de Grand-Lieu.