The challenge of fort l'écluse

The Fort L'Ecluse Challenge is a unique race on an exceptional site; a site steeped in history, combining both cultural heritage and grandiose landscapes…

Its courses of 12 or 19km, mix roads and paths, wide tracks and monotraces...

Departing from the village of Léaz, the routes cross spectacular landscapes, particularly near the listed site of the Virgin of Léaz overlooking the Rhône, and the gorge of the Ecluse. But the strong point of this trail is the passage in the incredible underground gallery of Fort l'Ecluse and its 917 steps.

Sunday 19 October 2025
daily between 9.45 am and 1 pm.

Free access. There is a charge to register for the challenges, but you can cheer on the runners for free. The route between the Lower Fort and the Upper Fort of the Fort l'Ecluse site will be prohibited to the public. (underground gallery, 917 steps).

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Chercher un itinéraire

À proximité

Sport

Hiking: Fort l’Ecluse on the banks of the Rhône

Léaz

28 Jun 2025

Cultural

Gendarmes résistants dans l’Ain, le choix de l’impossible” temporary exhibition

Léaz

Traditional cooking

Restaurant Le Sorgia

Valserhône

Community of communes

Terre Valserhône

Valserhône

Service providers

Randogéo

Dingy-en-Vuache

Sporting activities

Vol Rando en biplace parapente avec Didier Marinet

Valserhône

Sporting activities

Cours de plongée

Chêne-en-Semine

Historic site and monument

Fort l’Écluse

Léaz

Shops

La boutique de l’Office de Tourisme Terre Valserhône

Valserhône

Sport

La Voie du Tram

Valserhône

Sporting activities

Marche nordique avec Didier Marinet

Valserhône

Bed & breakfast

Chambres d’hôtes La Colonie

Collonges