Colmont
The Colmont () is a  long river in western France located in the departments of Orne, Manche (Normandy) and Mayenne (Pays de la Loire). It is a tributary of the river Mayenne on the right side, and so is a sub-tributary of the Loire by Mayenne and Maine. It flows into the Mayenne near Saint-Loup-du-Gast. Its longest tributary is the Ourde (11 km). The largest town on the Colmont is Gorron. References

Rivers of France
Rivers of Manche
Rivers of Mayenne
Rivers of Orne
Rivers of Normandy
Rivers of Pays de la Loire