Étréchy    

This small sector, at 2km from the railway station of Etrechy (RER C) has been rebrushed and repainted by Pascal Etienne in 2011, who has added 20 orange problems.
Access : park the car in front of the gymnasium of Le Quartier du Roussay. Follow la rue des frères Kennedy for 150m and then a path between two houses parallel to the road. 150m further, another path leads to the sector.