Trail l'Enfer des Nutons is a trail-running event in Fromelennes, located in the Ardennes region of northern France, offering races from 6 km to 42 km. The longest route measures 42.31 km with approximately 2,088 m of elevation gain and a similar descent, characterizing it as a challenging mountain-style trail rather than a straightforward forest run. Shorter options include a 22 km race with 1,100 m of climbing, an 11 km with 430 m, and a 6 km with 180 m, providing a progressive progression from introductory distances to a full-length trail.
The race embraces its local identity; organizers state it is the sole trail in the Ardennes pointe, situated within a nature reserve and the "land of the Nutons," mythical small figures associated with caves and rocks in Ardennes folklore. Start times are staggered throughout the morning, beginning with the 42 km runners, followed by the 22 km, 11 km, and 6 km participants. Team From Trail manages the event, and the entry fees for the distances are modest, contributing to the atmosphere of a local club race focused on demanding terrain rather than a highly produced mass participation event.