The Montesson Christmas Market will be held on Saturday, December 6, 2025 in the Parc des Sophoras for a magical day! A toboggan run, Santa Claus, stilt-walkers, creative workshops, face-painting and treats are all on the program. And don't forget the launch of the town's illuminations by Madame le Maire at 6pm!
On track for Pink October! In Montesson, solidarity kicks off with a pair of sneakers. On Sunday October 12, 2025, the Yvelines town launches the 2nd edition of the Foulées Roses, a 5 km walk/run, with all proceeds going to the Institut Gustave Roussy.
