Trémelin, Chambre au Loup, and Boutavent Loop

Important: This circuit is currently closed for works until the end of February 2026. Please check local signage or official tourism websites for updates before planning your visit.

This trail is generally considered moderate. While it's a rewarding experience, be prepared for its length (around 14 km) and some challenging sections. You'll encounter steep ascents and descents, particularly within the dramatic Vallon de la Chambre au Loup, and some rugged, rocky paths.

The circuit offers diverse scenery and historical sites. Key highlights include the tranquil Lake Trémelin viewpoint, the breathtaking Magnificent view of the Chambre au Loup with its 'Breton canyon' cliffs, and the historical Boutavent Castle Ruins. You'll also pass through deep woods, open moors, and areas rich in local flora like heather and gorse.

The trail typically starts near Lac de Trémelin. You should find parking facilities available in this area, which serves as a hub for outdoor activities. Specific parking details can often be found on local tourism sites like ille-et-vilaine-tourisme.bzh or brittanytourism.com.

While the trail passes through natural areas, specific regulations for dogs can vary. It's generally advisable to keep dogs on a leash, especially in protected zones or areas with wildlife. Always check local signage at the trailhead for any specific restrictions regarding pets.

The trail offers beauty in different seasons. Spring and autumn are often ideal for hiking in Brittany, with pleasant temperatures and vibrant colors. However, some sections in the woods can be humid. Given the current closure until late February 2026, planning for spring or summer 2026 onwards would be best.

Generally, there are no specific permits or entrance fees required to hike this trail or access the natural areas of the Forêt de Brocéliande. However, it's always good practice to respect the natural environment and any local regulations. For specific information on the wider Brocéliande area, you can consult local tourism resources.

Expect a varied terrain, including deep woods, open moors, and paths bordering Lac de Trémelin. The Vallon de la Chambre au Loup features striking purple schist rocky outcrops and impressive cliffs, with some steep and rugged sections. Some parts in the woods can be humid, but alternative paths are often available.

Yes, parts of this route may intersect with or be part of other official trails. Notably, sections of the hike align with 'La Chambre-au-Loup' and 'Étang de Trémelin - Le Perray'. You might also find connections to the 'Lac et landiers de Trémelin' and the long-distance 'GR 37 Tour de Brocéliande'.

Due to its moderate difficulty, length, and sections with steep, rugged terrain, this full circuit might be challenging for very young children or families not accustomed to longer hikes. However, shorter, easier walks around Lac de Trémelin are often available and more suitable for families.

The trail passes through diverse ecosystems, including forests, heathlands, and countryside, making it excellent for observing local wildlife. You might spot various bird species and butterflies, especially in the protected nature zones. Keep an eye out for signs of other forest inhabitants, though direct encounters are rare.