Sunday, November 1, 2026
· This weekend
Distance
Climb
Start Time
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Taking place on Sunday 1 November 2026 in Les Clayes-sous-Bois, Trail'Oween offers trail running over 10 km and 20 km, plus a 10 km Nordic walking event. Set in the Île-de-France region of France, this festive autumn race has a Halloween theme. Participants can enjoy the trails and support from the local community.
Participants wear Halloween costumes, adding to the festive atmosphere.
Around fifty volunteers help make the event possible.
This trail is part of the Trail des Yvelines challenge.
Approximately 140m of positive elevation gain on the 10 km and 280m on the 20 km.
Start / Finish
Parc Jean Carillon, Les Clayes-sous-Bois
Parc Jean Carillon, Les Clayes-sous-Bois
Route
What you get
Photo gallery access (from volunteer photographers)
On the day
Before you enter
Other questions
The Trail'Oween is held on Sunday 1 November 2026.
Yes, there is a 10 km Nordic walking (Marche Nordique) event.
Yes, Trail'Oween supports Imagine for Margo, an association fighting childhood cancer, through donations from each edition.
The 2026 edition is the 10th edition of Trail'Oween.
Yes, around fifty volunteers are involved in making the event possible, supporting roles such as photography and race-day organisation.
Les Clayes-sous-Bois, France
Sunday, November 1, 2026
More races like this one
€23
entry fee