You can download the Brasserie du Perche / Château de Gannes loop track below in KLM (Google earth) and GPX (GPS exchange) format for your hiking application.
You can do this trail on foot, mountain bike or on horeseback
Park at brasserie du Perche parking lot. The loop is 6.3 km and follows a section of the GR22 hiking trail from Paris to Mont St Michel. It includes several ponds and rivers, a 17th century watermill, the brewery with its taproom and beer garden, picnic tables, a food truck, a children's animal park, pedal boats and the ruins of a medieval castle. The castle is private property, stay on the path and do not go inside the walls. You can tie your horses at the brewery. The trail is accessible year round however, beware of several muddy sections during winter months.