The Viaduc des Fauvettes and the Forêt de Gif-sur-Yvette
Walker 
10.55 km
+217 m
-226 m
3h 40
Moderate
Departure from Bures-sur-Yvette (Essonne)
A walk of many faces! On forest tracks interspersed with paths through the city, you follow an old railway line with a tunnel and viaduct, finishing along the course of the river Yvette. A walk to enjoy at any time of year.
The Three Rivers Hike
Walker 10.69 km
+43 m
-46 m
3h 10
Moderate
Departure from Épinay-sur-Orge (Essonne)
Hike around Epinay sur Orge (a small town south of Paris) from the train station of the RER C.
It follows paths and quiet streets, heads through Bois des Templiers and follows the courses of three rivers: the Orge, the Rouillon and the Yvette. A trail through the Bois des Templiers with views of an old stone bridge with three arches of the ancient Templar Commandery of the eleventh century.
Walks near Yvette (l')
Following the Bièvre river through Saint-Quentin-en-Yvelines in Igny
Walker 
19.30 km
+26 m
-121 m
5h 35
Moderate
Departure from Montigny-le-Bretonneux (Yvelines)
The upstream part of this series of three hikes devoted to the Bièvre river. A very pleasant walk along the river and its bodies of water, in a mostly rural setting. A hike from station to station, which can be used to adjust the length depending on the weather conditions or desires of the hikers.