The best hiking routes in Parc naturel régional du Vexin Français

The Parc naturel régional du Vexin Français presents a landscape of wide agricultural plateaus cut by steep, wooded river valleys. Walking here, you will notice a distinct contrast between the flat, open fields of grain on the limestone heights and the damp, shaded woodlands of the Epte and Oise valleys below. The terrain is gently rolling rather than mountainous, characterized by ancient chalk cliffs, small marshlands, and quiet tributaries that feed into the Seine.

Underfoot, the paths transition from dry, dusty limestone tracks on the high plateaus to damp clay and alluvial soil along the valley floors. You will encounter sandstone ridges, known locally as the Butte de Rosne, where sandy paths wind through pine and heather, offering a different texture to the otherwise chalky and agricultural surroundings. In May, the woodland floors of the valley slopes are often covered in wild garlic, while the open plateaus remain exposed to the elements.

This area is not a wilderness of deep gorges or high peaks, but a working countryside where historic stone villages, old washhouses, and fortified farms are integrated into the landscape. The trails are well-marked, though the clay sections in the valleys can feel heavy after wet weather, and the open plateau tracks offer little shelter. It is a reliable destination for those seeking quiet, rural walking through a mix of farmland, deciduous forests, and small riverbanks.