Rondje Château de Mortefontaine en Forêt de Chantilly

The ride

Roll out of Dammartin-en-Goële and into the Parc naturel régional Oise-Pays de France, then on past the Château de Pontarmé. The Forêt de Chantilly leads you to castle ruins and the Château de Mortefontaine, before the Forêt d'Ermenonville and the river La Nonette carry you back to where you started. It's 70.4 km with 408 m of climbing, and the surface is almost entirely paved.