Trail-oween 2026

Trail-oween 2026 is a Halloween-themed trail running event held in Les Clayes-sous-Bois, centred on Parc Jean Carillon. The event offers multiple distances including 10 km and 20 km trail races and a 10 km nordic walking category, with routes run through forested, natural terrain and marked course signage. The race atmosphere is informal and costume-friendly, and chip timing is used for official results.

Registration and bib collection are handled via the organiser's registration pages, with mandatory presentation of a licence or identity document for bib pickup and on-site registration possible subject to bib availability. The event donates €1 per registration to Imagine For Margo and provides a secure bag drop and water points on course; further logistical details such as exact race start waves and final course profiles are published by the organiser on the event website and registration pages.