Best natural monuments around Belloy-En-France serve as a gateway to significant natural areas within the Val d'Oise department. The region features diverse landscapes, including the expansive Forêt de Carnelle and parts of the Montmorency Forest. These areas offer a variety of natural features, from dense woodlands and lakes to historical natural sites. The terrain provides opportunities for exploring varied environments and observing local flora and fauna.
Last updated: November 4, 2026
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Very nice trail running outing in the forest 🌳
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The fountain is on a small bend, be careful because it is quickly invaded by plants
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What is to be remembered from this route is the passage through the Carnelle forest. However, there are too many roads on the Isle Adam and along the Oise. No particular difficulty.
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pretty lake hidden in the middle of the forest
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High place of pilgrimage (in the region anyway) between the 15th and 18th centuries. The water from this fountain was said to have the power to cure various skin diseases (scabies for example). This pilgrimage ceased shortly before the French Revolution.
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This funerary megalith dates back to the beginning of the Neolithic period! It is the largest and most famous of all the covered alleys in the Paris region, which has become the archetype of burials associated with the Seine-Oise-Marne culture. All the slabs are in Fontainebleau sandstone, several outcrops of which are visible on the hillside.
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This bucolic path runs along the Stors marsh nature reserve. The ground quickly becomes muddy in bad weather and the days following the rain. That said, the setting is beautiful along the rock faces. For the rest, it's a fairly easy single.
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Magnificent natural reserve that this marsh of Stors.
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The region offers diverse natural monuments. Highly rated by the komoot community are the The Blue Lake of Carnelle, known for its distinctive color from gypsum and marl, and the Singletrack along the Marais de Stors, a scenic path through a nature reserve with rock faces.
Yes, several natural monuments blend natural beauty with history. The Saint Radegonde Fountain in the Montmorency forest was historically a pilgrimage site. Additionally, the Covered alley is a funerary megalith dating back to the Neolithic period, making it a significant historical natural site.
The region is notable for its unique geology. The Blue Lake of Carnelle gets its striking color from the gypsum and marl rock at its bottom, remnants of ancient quarries. You can also discover the Montmorency Sand Dune, a challenging off-track area with soft sand that gives the impression of being in a completely different landscape.
Absolutely! The Blue Lake of Carnelle is considered family-friendly, offering peaceful walks around its picturesque waters. The Covered alley, a megalithic structure, can also be an interesting and educational stop for families.
The natural areas around Belloy-En-France are perfect for various outdoor activities. You can find numerous routes for mountain biking, gravel biking, and cycling. For example, there are many MTB Trails around Belloy-En-France, including loops around the Pond and Château de la Chasse. Cyclists can explore routes like the 'Hunting Castle – Godard Pond loop' found in the Cycling around Belloy-En-France guide.
Yes, the Forêt de Carnelle, where The Blue Lake of Carnelle is located, is situated on a butte that marks the highest point in the Val-d'Oise department (210 meters), offering opportunities for panoramic views of the surrounding landscape.
The Forêt de Carnelle, a significant natural area, is recognized for its rich biodiversity. It supports a variety of wildlife, including numerous bird species, amphibians (with special 'crapauducs' for protection), and diverse flora like oaks, beeches, and rare plants such as the royal fern. The Marais de Stors nature reserve is also noted for its rich flora and fauna.
While the natural monuments can be enjoyed year-round, spring and autumn are particularly pleasant for hiking and exploring. Spring brings lush greenery and blooming flora, while autumn offers vibrant fall colors. Be aware that paths like the Singletrack along the Marais de Stors can become muddy after rain, so consider drier periods or wear appropriate footwear.
Many areas offer accessible paths for walking. While some trails like the Montmorency Sand Dune are challenging, others, such as the paths around The Blue Lake of Carnelle, are generally suitable for peaceful walks. Always check specific route details for difficulty levels.
The Forêt de Carnelle is a 975-hectare forest recognized as a ZNIEFF (Zone Naturelle d'Intérêt Écologique, Faunistique et Floristique) due to its ecological importance. It features unique geological formations like former gypsum quarries that now form lakes such as Lac Bleu, is the highest point in Val-d'Oise, and boasts rich biodiversity, including rare plants and protected amphibians. It also contains historical elements like ancient megalithic structures.
Generally, dogs are permitted on trails and in natural areas, but it's always best to keep them on a leash to protect wildlife and ensure the safety of other visitors. Specific rules may apply in certain protected zones or around sensitive ecological sites, so look for local signage.


Extend your search for the best caves by checking out these guides of the top ones around Belloy-En-France: