Oudon_(river)
The Oudon (French pronunciation: [udɔ̃] ⓘ) is a 103.2 km (64.1 mi) long river in the Mayenne and Maine-et-Loire départements, western France.[1] Its source is near La Gravelle. It flows generally south east. It is a right tributary of the Mayenne into which it flows between Le Lion-d'Angers and Grez-Neuville.
Its main tributary is the Verzée.