Vallée du Sarthon et affluents translated as Sarthon Valley and tributaries is a Natura 2000 conservation area that is 5,255 hectares in size.[1]
Geography
The area is focused on the Sarthon river a tributary to the Sarthe river.[1] The river flows from the Écouves forest massif creating alluvial plains.[1]
It is spread across 12 different communes all within the departments of Orne and Mayenne;[2]