Le Club Athlétique du Bassin Bellegardien and the Trail the World Association come together to offer you the 12th edition of Le Défi de Fort l'Ecluse.

Imagine a race on a unique and exceptional site. A site full of history, combining both cultural heritage and grandiose landscapes.

A course of 16km, running, climbing, and thoroughly invigorating... crossing the charming villages of Léaz and Longeray.

A breathtaking finale with the ascent of the 917 steps carved from the rock inside the Fort.

Sign-ups are limited to 500 participants. As of 20.03.2018 there are 394/500 places left. €16.-/person. Open to anyone born before 31 December, 2000.