Cérou

The Cérou (le Cérou) is an 87.1 km long river in the Aveyron and Tarn departments in southern France. Its source is at Saint-Jean-Delnous, 1.8 km northwest of the village. It flows generally west-northwest. It is a left tributary of the Aveyron, into which it flows at Milhars, 1.4 km north of the village.

Departments and communes along its course
It flows generally west through the following departments and communes, ordered from source to mouth:
 * Aveyron: Saint-Jean-Delnous, Lédergues
 * Tarn: Lédas-et-Penthiès, Lacapelle-Pinet, Padiès, Crespin, Andouque, Saint-Jean-de-Marcel, Valderiès, Rosières, Carmaux, Saint-Benoît-de-Carmaux, Monestiés, Le Ségur, Salles, Saint-Marcel-Campes, Cordes-sur-Ciel, Les Cabannes, Mouzieys-Panens, Vindrac-Alayrac, Labarthe-Bleys, Marnaves, Milhars

Tributaries
The Farruel (12.5 km), the Boutescure (15.4 km), the Céroc (17.6 km), the Candou, the Céret (28.5 km), the Zère, the Aymer (12,2 km), and the Bonnan.