Fontenay-Trésigny, Marles-en-Brie, La Houssaye-en-Brie and crosses the Forest of Crécy up to Crécy-la-Chapelle. It goes through Bouleurs and Nanteuil-lès-Meaux, arriving
Forest-l'Abbaye, Forêt du Crécy, Crécy-Estrées, Wadicourt and Dompierre-sur-Authie. There were plans to extend the line into the Pas de Calais department