Best natural monuments around Baillet-En-France are found within the Parc Naturel Régional Oise-Pays de France, a region characterized by diverse natural landscapes. This area, situated north of Paris, includes forests, valleys, agricultural plains, and wetlands. The local environment offers significant biodiversity and ecological value, making it a destination for nature exploration.
Last updated: July 4, 2026
Highlight (Segment) • Trail
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Highlight • Forest
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Highlight • Natural Monument
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Highlight • Historical Site
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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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Visitors particularly enjoy the Singletrack along the Marais de Stors, known for its rich flora and fauna within a nature reserve. Another favorite is The Blue Lake of Carnelle, a forest lake whose distinctive color comes from its gypsum and marl rock bottom, surrounded by beautiful trees.
Yes, several natural sites are great for families. The Blue Lake of Carnelle is a family-friendly forest lake. The Covered alley, a Neolithic funerary megalith, is also suitable for families. Additionally, the Parc du Bois de l'Etang in Baillet-en-France offers a 4 km walking path accessible to all, a fitness trail, and playgrounds for children.
The region features interesting historical natural monuments. The Covered alley is a significant funerary megalith dating back to the Neolithic period, recognized as the largest and most famous in the Paris region. Another site of historical interest is the Saint Radegonde Fountain, which was historically a pilgrimage site believed to have healing waters.
For wildlife spotting, the Marais de Stors nature reserve is an excellent choice, known for its rich flora and fauna. The Parc du Bois de l'Etang is a haven for diverse wildlife, including foxes, wild boars, Canada geese, grey herons, and red squirrels. The vast Forêt de l'Isle-Adam also provides a habitat for numerous species, such as various birds, amphibians, roe deer, and wild boars.
Absolutely! The area offers many opportunities for outdoor activities. You can find numerous routes for gravel biking, mountain biking, and road cycling. The Forêt de l'Isle-Adam, which extends into the region, is particularly well-suited for hiking, mountain biking, and horseback riding, with 6 km of cycling paths that are generally easy for children.
You can discover several unique natural features. The Blue Lake of Carnelle stands out with its distinctive blue color, a result of the gypsum and marl rock at its bottom. The Parc du Bois de l'Etang is home to the purple orchid (Orchis purpurea), a protected and rare wild plant, indicating a rich and preserved ecosystem. The Auversian Geological Site showcases a unique geological substrate formed from the famous sands of Auvers.
The natural monuments around Baillet-En-France can be enjoyed throughout the year, but spring and autumn are particularly pleasant. Spring brings blooming flora, including the rare purple orchid in Parc du Bois de l'Etang, and mild weather for outdoor activities. Autumn offers beautiful foliage, especially in the Forêt de l'Isle-Adam, and comfortable temperatures for hiking and cycling.
Yes, the Parc du Bois de l'Etang in Baillet-en-France is an ideal spot for leisurely walks and picnics. It features a 4 km walking path that is accessible to all, with flat terrain, and amenities like parking and restrooms are available. The vast Forêt de l'Isle-Adam also offers extensive trails for long walks amidst ancient trees and diverse wildlife.
While specific accessibility details for all highlights vary, the Parc du Bois de l'Etang within Baillet-en-France offers a 4 km walking path that is described as accessible to all, with flat terrain. For other sites, it's advisable to check individual highlight details or local information for specific accessibility features.
Beyond the most popular spots, the Auversian Geological Site, an old quarry being restored, offers a unique educational insight into the region's geological substrate. The Parc du Bois de l'Etang, while within the town, is a significant natural asset with its diverse ecosystem and historical ice houses, offering a serene escape that might be overlooked by those focusing solely on larger forests.
Generally, dogs are welcome on trails and in natural areas in France, often on a leash. The Forêt de l'Isle-Adam and Parc du Bois de l'Etang are popular spots for dog walking. However, for specific natural reserves like the Marais de Stors, it's always best to check local regulations regarding pets to ensure the protection of sensitive flora and fauna.


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