The Tripoulin (or Tripoulain), a small river classified in the 2nd category, rises in the Bonnétable forest and flows through the public park near the Château.
The river Tripoulin is full of fish. It divides into two easily accessible arms, which are lined with information panels explaining the fishing regulations (Fédération Pêche 72) and the biodiversity present.
Information: AAPPMA "truites et gardons du saosnois".