Boulogne (river)
Introduction


The river **Boulogne** () is located in western [France](/wiki/France "France") in the [départements](/wiki/Departments_of_France "Departments of France") [Loire\-Atlantique](/wiki/Loire-Atlantique "Loire-Atlantique") and [Vendée](/wiki/Vend%C3%A9e "Vendée").

It is  in length and flows north from the source near [Saint\-Martin\-des\-Noyers](/wiki/Saint-Martin-des-Noyers "Saint-Martin-des-Noyers"), through [Les Essarts](/wiki/Les_Essarts%2C_Vend%C3%A9e "Les Essarts, Vendée") and [La Merlatière](/wiki/La_Merlati%C3%A8re "La Merlatière"), then through [Boulogne, Vendée](/wiki/Boulogne%2C_Vend%C3%A9e "Boulogne, Vendée") and [Les Lucs\-sur\-Boulogne](/wiki/Les_Lucs-sur-Boulogne "Les Lucs-sur-Boulogne") into the [Lac de Grand\-Lieu](/wiki/Lac_de_Grand-Lieu "Lac de Grand-Lieu"). This lake is drained by the river [Acheneau](/wiki/Acheneau "Acheneau") towards the [Loire](/wiki/Loire "Loire").


What are the sources and destinations of the river Boulogne?