Best canyons around Fleury-En-Bière are found within the nearby Fontainebleau Forest, an area known for its unique geological formations. This region features impressive sandstone boulders, rock formations, and gorges that provide a canyon-like experience. The landscape is a result of ancient marine deposits, forming extensive banks of sandstone. It is a destination for bouldering and hiking.
Last updated: July 5, 2026
Highlight • Gorge
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The mouse cave is a Milly classic that all children know. It is a large cavity about 20 meters long, where you cannot stand up. It is even possible to exit through a narrow passage.
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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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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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Walk to the acute mountain, near the pheasant farm in Fontainebleau. The cave of the oath to see, in full course, one does not expect it and yet.
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Around Fleury-en-Bière, you'll discover unique geological formations within the Fontainebleau Forest, which offer a canyon-like experience. These include impressive sandstone boulders, rock formations, and 'gorges' that are popular for hiking and bouldering. The landscape is a result of ancient marine deposits, forming extensive banks of sandstone.
Visitors frequently enjoy the Grotte du Serment, known for its surprising vault made of a single rock and the historic D.F.D. engraving. Another popular spot is Apremont gorge, which is part of the Denecourt-Colinet trail n° 6 and features large rocks suitable for climbing. The Gorges du Houx also offers a fun passage where you can navigate between rocks.
Yes, the Apremont Gorges Panorama offers breathtaking views of the surrounding vegetation. It's described as a technical rockgarden and provides a wide vista, which can be particularly striking in winter.
The Fontainebleau Forest, where these gorges are located, is world-famous for bouldering and hiking. You can also find various cycling opportunities. For road cycling, explore routes like the 'Château de Courances – Fleury-en-Bière Castle loop' from Arbonne-la-Forêt, detailed in the Road Cycling Routes around Fleury-En-Bière guide. For mountain biking, consider trails like the 'Belvedere Trail – Panorama loop' from Arbonne-la-Forêt, available in the MTB Trails around Fleury-En-Bière guide.
Many of the trails within the Fontainebleau Forest, including sections of the historic Denecourt-Colinet paths that pass through gorges like Gorges du Houx, are suitable for families. These areas offer varied terrain and opportunities for exploration, allowing visitors to navigate between rocks in a fun way. The unique rock formations can also be engaging for children.
The Fontainebleau Forest, with its gorges and rock formations, can be enjoyed throughout the year. Spring and autumn offer pleasant temperatures for hiking and bouldering, with beautiful foliage changes. Summer is also popular, though it can be warmer. The Apremont Gorges Panorama is noted to have a different and surprising view in winter due to the bare trees.
The landscape is primarily characterized by extensive banks of sandstone boulders and unique rock formations. These features are a result of ancient marine deposits from the Oligocene age, where fine, white sand formed the basis of the current geological structures. You'll find a patchwork of moorland, timber forest, and varied relief, contributing to a rich biodiversity.
Visitors particularly enjoy the unique geology and the sense of adventure offered by navigating between the rocks. The Gorges du Houx is described as 'beautiful as it is fun' for slaloming between rocks. The Apremont gorge is appreciated for its 'very nice passage' and 'huge rocks' suitable for climbing. The serene natural beauty and the challenge for climbers are also highly valued.
Yes, some of the gorges are part of the historic Denecourt-Colinet trails. For instance, Apremont gorge is a passage of trail n° 6, and Gorges du Houx is on trail n° 8. The Grotte du Serment even features engravings by Denecourt himself, adding a historical layer to the natural exploration.
Yes, the area around Fleury-en-Bière offers gravel biking opportunities. You can explore routes like the 'Belvedere Trail – Panorama loop' from Oncy-sur-École or the 'Barbizon Village – Platière de Coquibus loop' from Barbizon. More details can be found in the Gravel biking around Fleury-En-Bière guide.
The letters D.F.D. engraved within the Grotte du Serment were made by Denecourt himself, a significant figure in the development of trails and exploration in the Fontainebleau Forest. The engraving stands for 'Last Folie Denecourt' or 'Last Madness Denecourt,' adding a unique historical and personal touch to this natural monument.


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