Best natural monuments around Génicourt are found within the French Vexin Regional Natural Park, located in the Val-d'Oise department of the Île-de-France region. This area provides access to several notable natural monuments, offering diverse features for nature enthusiasts. The landscape includes panoramic viewpoints, ancient flora, geological sites, and tranquil marshlands, contributing to the region's natural heritage.
Last updated: May 7, 2026
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I looked for the old chestnut trees, but alas I saw nothing! Maybe I didn't take the right path. But on the side of the GR, a lot of barriers and signs “private property, no entry, traps, etc.,” made me not want to get off the trail!
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The mounds of Rosne or mounds of Rône are located in the Vexin, on the border of the departments of Val-d'Oise and Oise. At 216 meters above sea level, they are the highest point in the departments of Val-d'Oise and Oise and the highest natural point in the Île-de-France region.
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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 frequently enjoy the Singletrack along the Marais de Stors for its beautiful marshland scenery and rock faces. The Butte de Rosne is also highly regarded as the highest natural point in the Île-de-France region, offering expansive views. The Auversian Geological Site provides a unique educational experience with its distinctive "sands of Auvers."
Yes, several natural monuments are suitable for families. The Auversian Geological Site is mainly for educational purposes and public awareness, making it an interesting stop for all ages. The Butte de Rosne, with its easy access and panoramic views, is also considered family-friendly.
The region boasts diverse natural features. You can explore the unique geological substrate of the Auversian Geological Site, formed from the famous "sands of Auvers." The Ancient Chestnut Trees of Butte de Marines are over 300 years old, showcasing remarkable size. Additionally, the area features intriguing Large Sinkholes in Parc Naturel Régional du Vexin Français, which are collapses filled with water.
The Vexin Français Regional Natural Park offers a variety of outdoor activities. You can find numerous hiking trails, including routes like the 'Julius Caesar Road and Viosne Valley Trail.' For cyclists, there are options such as the 'Château de Théméricourt – Village d'Us loop.' Mountain biking enthusiasts can explore trails like the 'Banks of the Oise River – Oise Riverside Walk loop.' You can find more details on these activities in the dedicated guides for hiking, cycling, and MTB trails around Génicourt.
The highest natural point in the Génicourt area, and indeed in the Val-d'Oise, Oise, and Île-de-France regions, is the Butte de Rosne. Standing at 216 meters above sea level, it provides expansive panoramic views of the surrounding Vexin landscape, making it a rewarding destination for those seeking scenic vistas.
Yes, the Ancient Chestnut Trees of Butte de Marines are a significant historical natural site, with many trees dating back over 300 years. Their remarkable size and wide trunks are a testament to their age. Additionally, the Auversian Geological Site, an old quarry, offers insights into the region's geological history.
The Singletrack along the Marais de Stors is a picturesque path running alongside the Stors marsh nature reserve. It offers beautiful scenery with rock faces lining the route. While it's generally considered an easy singletrack, be aware that the ground can become quite muddy after rain, so appropriate footwear is recommended.
The natural monuments around Génicourt, located within the Vexin Français Regional Natural Park, are generally enjoyable throughout the spring, summer, and autumn months. Spring brings blooming flora, summer offers warm weather for longer explorations, and autumn provides beautiful foliage. While accessible in winter, some trails, like the Singletrack along the Marais de Stors, can become very muddy after rain or snow.
Absolutely. The Auversian Geological Site is an old quarry known for its distinctive "sands of Auvers," providing a fascinating look into the region's geological past. Additionally, the Large Sinkhole in Parc Naturel Régional du Vexin Français highlights unique geological formations, being collapses filled with water.
Visitors appreciate the diverse natural beauty and tranquility. They often highlight the panoramic views from the Butte de Rosne and the unique experience of walking among the ancient trees at the Butte de Marines. The scenic setting along the rock faces of the Singletrack along the Marais de Stors is also frequently praised, despite potential muddy conditions.
Yes, several trails cater to different skill levels. The Singletrack along the Marais de Stors is described as a fairly easy singletrack, suitable for those looking for a less strenuous experience. The access to the Butte de Rosne is also noted as easy and quiet, making it accessible for beginners to enjoy the views.


Extend your search for the best caves by checking out these guides of the top ones around Génicourt: