4.6
(562)
3,086
hikers
238
hikes
Hiking in Forêt De Rosny offers a network of trails through dense woodlands and open calcareous grasslands. The region is characterized by its varied forest terrain and gentle elevation changes, providing accessible paths for different skill levels. These routes often traverse natural areas, showcasing the local flora and fauna. The landscape primarily consists of established forest paths and open clearings.
Last updated: May 8, 2026
5.0
(3)
22
hikers
13.7km
03:43
190m
190m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.5
(2)
19
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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5.0
(2)
8
hikers
19.3km
05:16
300m
300m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.
5
hikers
6.73km
01:46
50m
50m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
5
hikers
9.37km
02:30
110m
110m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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The regional forest of Rosny is the green lung of the north-west of Île-de-France, with 1,751 hectares of wooded areas classified as a Natura 2000 site. It is located on a plateau which offers beautiful viewpoints when the landscape emerges.
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Magnificent washhouse in a superb location.
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A beautiful wash house in front of a very beautiful house.
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Forêt De Rosny offers a wide network of over 240 hiking trails. These routes cater to various preferences, ranging from easy strolls to more challenging long-distance paths through woodlands and calcareous grasslands.
Yes, Forêt De Rosny has over 80 easy hiking trails perfect for beginners or those looking for a relaxed walk. An excellent option is the Walk Near the Gas Wells – Ferme des Huit Routes loop from Boissy-Mauvoisin, an easy 4.2-mile (6.7 km) path with gentle terrain.
For those seeking a more demanding experience, Forêt De Rosny features over 35 difficult trails. A notable challenging route is the Calcareous grasslands – Rosny Forest loop from Lommoye, which spans 12.0 miles (19.3 km) and involves significant elevation changes.
Many of the trails in Forêt De Rosny are designed as circular routes, allowing you to start and end at the same point. For example, the popular Rosny Forest – Calcareous grasslands loop from Boissy-Mauvoisin is an 8.5-mile (13.7 km) circular trail that showcases the diverse landscape.
Yes, Forêt De Rosny is well-suited for family hikes, offering many easy and moderate paths with gentle elevation changes. The varied forest terrain provides an engaging environment for children, and the accessible paths make it enjoyable for all ages. Consider routes like the Ferme des Huit Routes loop from Boissy-Mauvoisin for a pleasant family outing.
Forêt De Rosny is generally dog-friendly, with many trails suitable for walks with your canine companion. It's always recommended to keep dogs on a leash, especially in areas with wildlife or near roads, and to respect local signage regarding pet access.
While hiking in Forêt De Rosny, you might encounter various forest wildlife. The dense woodlands and open calcareous grasslands are home to deer, wild boar, and a variety of bird species. Keep an eye out for smaller mammals and diverse insect life, especially in the more secluded areas.
Forêt De Rosny offers scenic beauty primarily through its dense woodlands and expansive calcareous grasslands. While there aren't dramatic mountain viewpoints, the trails often open up to picturesque clearings and provide tranquil forest vistas. The interplay of light through the trees and the unique flora of the grasslands create many beautiful spots for observation.
The best time to hike in Forêt De Rosny is typically during spring, summer, and autumn. Spring brings vibrant greenery and wildflowers, while autumn offers stunning foliage colors. Summer provides pleasant conditions for longer walks. Even in winter, the forest can be beautiful, though some paths might be muddy or icy.
Hiking in Forêt De Rosny is possible during winter, offering a different, serene experience. The forest takes on a quiet beauty, and the trails are generally accessible. Be prepared for colder temperatures, potentially muddy or icy sections, and shorter daylight hours. Dress in layers and wear appropriate footwear.
Parking is generally available at various access points around Forêt De Rosny, particularly near the starting points of popular trails and in nearby villages like Boissy-Mauvoisin or Lommoye. Look for designated parking areas or roadside spots where permitted.
Public transport options to Forêt De Rosny are limited, as is common for many natural forest areas. Access is primarily by car. However, you may find local bus services connecting to nearby towns, from which you could potentially walk or arrange further transport to the forest's edges. It's advisable to check regional transport schedules in advance.
While Forêt De Rosny itself is a natural area without extensive facilities, you can find cafes, restaurants, and other amenities in the small villages surrounding the forest, such as Boissy-Mauvoisin, Lommoye, or Saint-Illiers-la-Ville. It's a good idea to plan your refreshments before or after your hike.
The komoot community highly rates hiking in Forêt De Rosny, with an average score of 4.6 stars from over 500 reviews. Hikers often praise the peaceful atmosphere, the well-maintained paths, and the beautiful blend of dense woodlands and open calcareous grasslands. Many appreciate the variety of routes suitable for different fitness levels.
While many trails in Forêt De Rosny feature gentle terrain, dedicated wheelchair-accessible paths are not widely signposted. Some wider, flatter forest tracks might be manageable, but it's best to check specific route conditions or local accessibility information if you require wheelchair access.


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