North of Saint Martin sur Oust
The southern sector of the village of Saint Martin sur Oust ( in the Lower Oust Valley's listed natural beauty spot) is divided by the river Oust and the northern sector by the "Bois de Grisan" woods.

Three discovery trails with interpretation panels
Here surrounded by nature, one finds three walking routes with educational interpretation panels.
These discovery trails supply all the information necessary for learning about the animals which reside in the Grisan woods.

Observation towers
Detailed, precise and humoristic, the panels which are installed all along these trails explain about the behaviour of deer, red ants, badgers...
From 2 observation towers, you may be lucky enough to catch a glimpse of the forest's residents.

Picnic area
Setting off from the village centre in Saint Martin sur Oust, take the road to Carentoir (D14), the "Bois de Grisan" will be indicated on your left. Next to the car park you'll find a sheltered picnic area.