Les Décalés de la Citrouille is a Halloween-themed night trail race held in Sennely, a village within France's Loiret department. Participants can select from three race distances: the 9 km Petit Décalé, the 18 km Grand Décalé, and the 27 km Ultra Décalé. The 18 km and 27 km races are designated for adults, while the 9 km race is accessible to individuals aged 16 and older. Registration is managed online by chosen distance, with a distinct procedure for groups and businesses wishing to register multiple runners and process a single payment.
All three races commence and conclude at the Halles de Sennely, located in the village center. The 27 km race begins first, followed shortly by the two shorter races. The courses traverse local trails surrounding Sennely, requiring participants to wear attire suitable for running in darkness. The pumpkin theme defines the event's character, and participants are encouraged to wear Halloween costumes. Bib collection is divided between RRunning Orléans prior to the race day and the dojo in Sennely on the evening of the event. The organizers also seek volunteers and promote carpooling for transportation to the venue.