Best canyons around Milly-La-Forêt are characterized by unique geological formations within the Fontainebleau Forest. This region features impressive sandstone rock formations and "gorges" that, while not true canyons, offer a similar sense of natural grandeur. Milly-la-Forêt is known as a "city of sandstone" due to the abundance of this rock, which has influenced its architecture. These areas provide opportunities for exploring diverse landscapes and geological significance.
Last updated: May 9, 2026
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I do believe this is an excellent website. I stumbled upon it I may revisit once again since I saved as a favorite it. https://www-sunpass.com
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Attention ⚠️ viewpoint accessible by Bleu Denecourt pedestrian path.
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The cave of the oath is quite surprising, especially because the vault is made of a single rock. The letters D.F.D were engraved on the cave by Denecourt himself and mean "Last Madness Denecourt".
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Forming a bottleneck where several paths meet. A magnificent landscape in all seasons. The pleasure of riding here!
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Very nice point of view, the forest, the rocks, it's just beautiful :)
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It's a great passage on the sidelines of the Denecourt-Colinet trail n ° 8, where we slalom between the rocks! It is as beautiful as it is fun.
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The Oath Cave is quite surprising, especially because the vault is made of a single rock. The letters D.F.D were engraved on the cave by Denecourt himself and mean "Last Folie Denecourt".
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Here is a very nice passage of the Denecourt-Colinet trail n ° 6, which overhangs the forest and makes us walk on huge rocks.
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The region around Milly-La-Forêt, situated near the Fontainebleau Forest, is known for its unique sandstone rock formations and "gorges" rather than traditional canyons. Key spots include Grotte du Serment, which features a vault made of a single rock and historical engravings. Another popular area is Apremont gorge, known for its passage overhanging the forest with large rocks suitable for climbing. Visitors also enjoy Gorges du Houx, a natural monument where you navigate between rocks, offering both scenic beauty and an engaging experience.
You will encounter impressive sandstone rock formations, often described as a "chaos" of rocks scattered throughout the forest. These are erosive remnants from the Oligocene age, creating large nodules. Milly-la-Forêt is even referred to as a "city of sandstone" due to this abundance. Beyond the unique geology, the areas offer diverse forest landscapes, rich flora, and fauna, especially within the Forêt Domaniale de Fontainebleau.
Yes, the Fontainebleau Forest, which encompasses the areas around Milly-La-Forêt, is considered the biggest and most developed bouldering area globally. You'll find extensive bouldering opportunities at locations like Les Trois Pignons Massif, including popular spots like Le Cul de Chien and La Canche aux Merciers. The unique Oligocene-age sandstone boulders are renowned for their quality and variety, catering to all skill levels.
Absolutely. The areas around Milly-La-Forêt and within the Fontainebleau Forest offer numerous hiking trails. You can explore diverse landscapes and natural features. For a comprehensive list of routes, check out the Hiking around Milly-La-Forêt guide, which includes trails like the Milly-la-Forêt and Coquibus Trail.
Many areas are suitable for families, especially for hiking and exploring the unique rock formations. While some bouldering problems can be challenging, there are also easier sections. When visiting areas like Rocher de Milly, it's advised to stay on marked paths and keep dogs leashed from April to July to protect the biological reserve. The engaging experience of navigating between rocks, as found in Gorges du Houx, can be fun for all ages.
The terrain primarily consists of forest paths interspersed with significant sandstone rock formations. You can expect to navigate through areas with large boulders and sometimes uneven ground. Many of the highlighted "gorges" are categorized as intermediate difficulty, meaning they might involve some scrambling or walking over rocky sections. For example, Apremont Gorges Panorama is noted for its "technical rockgarden."
Beyond exploring the rock formations, the region offers excellent opportunities for cycling. You can find numerous routes for both gravel biking and mountain biking. For detailed routes and guides, explore Gravel biking around Milly-La-Forêt and MTB Trails around Milly-La-Forêt.
The Fontainebleau Forest and its rock formations are generally accessible year-round. Spring and autumn offer pleasant temperatures for hiking and bouldering, with beautiful foliage. Summer can be warm, but the forest provides shade. Winter visits are also possible, offering a different, often quieter, perspective, especially for viewpoints like Apremont Gorges Panorama, where the view can be "different and surprising in winter!"
Yes, the Apremont Gorges Panorama is a highly recommended viewpoint, offering breathtaking views of the surrounding vegetation and forest. It's a great spot to appreciate the vastness of the Fontainebleau Forest and its unique geological landscape.
Milly-la-Forêt itself offers various amenities. For information on local services, including cafes, pubs, and accommodation, you can consult the official tourism website for the area. The town is well-equipped to cater to visitors exploring the surrounding natural attractions. You can find more details on Milly-la-Forêt's tourism site.
While popular bouldering spots can attract crowds, the vastness of the Fontainebleau Forest means you can often find quieter areas. Exploring lesser-known trails or visiting during off-peak hours (weekdays, early mornings) can help you discover more secluded spots. The forest offers countless paths and formations, so venturing slightly off the main routes can lead to peaceful discoveries.
Their uniqueness stems from the specific geological history of the Fontainebleau Forest. These are not typical river-carved canyons but rather ancient sandstone formations, sculpted by erosion over millennia. This creates a distinctive landscape of massive boulders, rock shelters, and narrow passages, making it a world-renowned destination for bouldering and a fascinating area for geological exploration and hiking.

