![](/images/other/stat-length.png)
![Trail Walking Perdreauville - La forêt de Rosny - Apremont - Photo](https://media.geolcdn.com/t/1900/400/ext.pjpeg?maxdim=2&url=https%3A%2F%2Fservices.sitytrail.com%2FGeolivesWS%2FDownloadMedia.ashx%3FTrailID%3D317218%26Media%3D16393_1.jpg)
La forêt de Rosny - Apremont
tracegps
User
![Length](/images/other/stat-length.png)
![Max alt](https://static1.geolcdn.com/siteimages/upload/files/1508320355ic_sort_altitude_max_24dp.png)
![Uphill gradient](https://static1.geolcdn.com/siteimages/upload/files/1508320355ic_sort_den_pos_24dp.png)
![Km-Effort](/images/other/stat-length.png)
![Min alt](https://static1.geolcdn.com/siteimages/upload/files/1508320355ic_sort_altitude_min_24dp.png)
![Downhill gradient](https://static1.geolcdn.com/siteimages/upload/files/1508320355ic_sort_den_neg_24dp.png)
![Boucle](https://static1.geolcdn.com/siteimages/upload/files/16400158638029165_repeat_loop_refresh_sync_direction_icon.png)
![Walking](https://static1.geolcdn.com/sitytour/trail-icons/101.png)
4h30
Difficulty : Difficult
![Scan this QR Code to open this trail in the SityTrail application](https://capi.geolives.com/qq0zvz2zws4bq2lad0pu/sitytour/trails/317218/qr.png?size=200)
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About
Trail Walking of 18.4 km to be discovered at Ile-de-France, Yvelines, Perdreauville. This trail is proposed by tracegps.
Description
Seul massif forestier important du Nord-Ouest des Yvelines, la forêt régionale de Rosny est une composante incontournable du paysage départemental. Véritable poumon vert du Mantois, elle domine les coteaux de Mantes à Rolleboise, en rive gauche de la Seine, et offre de magnifiques points de vue sur les alentours. Des habitats naturels diversifiés et une richesse écologique rare confèrent à cette forêt un intérêt patrimonial indéniable.© Agence des Espaces Verts - Île de France. Téléchargez le dépliant de la forêt régionale de Rosny .
Positioning
Comments
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Magnifique parcours. ..je l'ai fait en course à pied...2h de footing sans grande difficulté pour des coureurs capables de tenir la distance; un régal en automne sous le soleil. ..pour info au carrefour Henry on ne peut plus suivre le tracé car il y a une zone de chasse entouré de barbelés; prendre le 1er chemin à droite du tracé et continuer tout droit pour rejoindre sa rando. J'y retournerai.