The Course des 2 châteaux connects Château de Pierrefonds with Stade Petitpoisson in Compiègne, France. This late-September nature race offers two running distances, approximately 10 or 11 kilometers and 17 kilometers, alongside walking routes of similar lengths.
The course crosses the Compiègne forest, with its rolling terrain, making it suitable for runners seeking consistent ground and speed. Participants on foot will also enjoy the forest environment at a relaxed pace, with bib collection available at Stade Petitpoisson.