Les Décalés de la Citrouille is a Halloween-themed night trail race in Sennely, where runners navigate 9 km, 18 km, or 27 km routes after dark. The Ultra Décalé, the longest option, begins at 8:00 PM. The 18 km Grand Décalé and 9 km Petit Décalé commence at 8:15 PM beneath the halls of Sennely.
The event requires participants to run in total autonomy, managing themselves on the trails instead of relying on a heavily supported road-race setup. The 18 km and 27 km distances are for adults, while the shorter course offers less experienced trail runners an entry into the night format. Costumes are encouraged, aligning with the pumpkin-and-Halloween theme and adding a playful element to the start line compared to a standard trail race.