Trail de Bois le Duc is a trail-running event held on the heights above Nancy, near the Hôpital de Brabois in Vandœuvre-lès-Nancy. Taking place in October, it offers adults routes of 8, 14, 21, and 28 km, alongside children’s races. The shorter routes still involve significant climbing: the 8 km course features approximately 170 m of ascent, the 14 km has about 340 m, and the 21 km includes around 500 m. This is hilly trail running, not a flat town race.
The courses traverse varied terrain and landscapes in the Brabois area, with GPX files available for those wishing to preview the routes. The participant field is limited to prevent trail congestion. Practical information regarding parking and bib collection is communicated to runners via email in the race booklet. The event maintains a deliberately local and friendly atmosphere: volunteers arrange surprises, participants receive a registration gift, Strava segments are incorporated into the experience, and the finish area features a popcorn machine, a country-style buffet, and Moroccan soup.