Cassel Urban Trail is a 12 km night race in Cassel, a hill town in the Nord department of northern France. It is usually run in late November, with participants setting out after dark rather than on a daytime road course. The event is open to beginners, regular runners, and more experienced trail runners, positioning it more as a shared local challenge than a specialist race for fast athletes.
The route combines town streets with natural sections around Cassel, allowing runners to see the area on foot while completing a 12 km effort. The course utilizes the town’s small streets and the surrounding Hauts-de-France landscape, and the organizers suggest it is suitable for various levels. The race emphasizes a friendly night atmosphere, local support, and the appeal of running through Cassel when the town has a different feel after dark.