How about a trail run through the esplanade and park of the Château de Pierrefonds, an architectural gem and masterpiece designed by Viollet-le-Duc? The trail starts off through the forest before passing through the town to finish. It’s held in January with a choice of two routes (8 miles and 17 miles), including one for walkers.
![Northern France _ Mining area _ Trail des Pyramides Noires © Pidz](https://www.tourisme-en-hautsdefrance.com/app/uploads/crt-hautsdefrance/2020/12/thumbs/trail-des-pyramides-noires-pidz-trail-des-pyramides-noires-748-640x480.jpg)