Mancelles Alps, Geological formation in Saint-Léonard-des-Bois, France
The Alpes mancelles are a geological formation in the northern part of the Sarthe department, sitting within the Normandie-Maine Regional Natural Park, where steep slopes drop into narrow valleys crossed by the Sarthe River. The rocks are very old and have been shaped over millions of years into cliffs, scree slopes, and wooded gorges that make the terrain noticeably varied.
The rocks of the Alpes mancelles are hundreds of millions of years old, formed when the region was subject to tectonic forces and then gradually worn down by water and wind over a very long time. In 2024, the Normandie-Maine Regional Natural Park, which covers this area, was recognized as a UNESCO Geopark, drawing attention to the long geological story written in the stones.
The name Alpes mancelles, meaning "Alps of the Maine," may sound surprising for a region of heathered hills and narrow gorges, but it reflects the steepness that walkers notice almost immediately. Nearby Saint-Céneri-le-Gérei, part of the same area, drew many painters in the 19th century who came to work in the open air, and it is today listed among the most beautiful villages in France.
Saint-Léonard-des-Bois serves as the main starting point for walks, with trails leading to viewpoints like Haut Fourché and Narbonne that look over the valley and the river below. Good footwear is helpful since the ground can be steep and uneven, and it is worth carrying water as some routes pass through remote stretches.
Saint-Léonard-des-Bois, the village that acts as the gateway to this area, takes its name from a monk who founded a monastery there in the 6th century. Today the village offers unusual sleeping options such as treehouses and bubble tents, letting visitors spend the night surrounded by the same landscape they came to explore.
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