Les meilleures activités autour du lac Léman

25 Culture Fort l'Ecluse, Leaz

Love jazz ? Our exclusive program presents internationally renowned groups and runs from June to September.
And what’s more, this 13th century fort, rebuilt over the years until the 19th century, is one of the major regional bat protection sites. Here, you can see, hear and observe them in their thousands – a truly thrilling sight ! An exhibition completes the visit, with plenty of surprising facts about this misunderstood animal.
New : the sound and light show immerses you in the fascinating history of Fort l'Ecluse, which takes place in a 13-minute sequence on the front façade. Subscribe to our newsletter at www.fortlecluse.fr

In the heart of the Gex transversal valley, the site of Fort l'Ecluse is a natural, strategic passage between the Jura and the Alps since Roman times.
Constructed at the place of a 13th century fortified dwelling, Fort l'Ecluse has always played the role of a border. When it became French in 1601, the Royal engineers enlarged and reinforced the buildings. At the beginning of the 19th century, the fort dug directly in the rockbed was restructured in 2 phases to accommodate a strengthened fortification.


By road : motorway A40 Mâcon-Geneva : exit n°10 Bellegarde-sur-Valserine. motorway A39 : exit n°7 Poligny, then RN5 direction Gex and Bellegarde. motorway N1 (Switzerland) : exit Meyrin/St Genis Pouilly and then direction Bellegarde.

Tarifs, forfaits

Individual rates :
- Adults: 6 €
- Children 6 to 16 years: 4.50 €
- Student fee and job seeker (with identification): 4.50 € 
- Family price (2 adults and 2 children minimum): 17 €
- Twin visit Fort l'Ecluse + château de Voltaire: 10 €
- Annual card adults: 10 €
- Annual card reduced rates: 7 €
- Children under 6 years : free

Rates for groups of at least 20 people:
- Adults: 5.50 €
- Children: 4.00 €

Dates de validité

From June to September

Visites guidées proposées et durées


Free visit : 1h30 to 2h30

Movie in computer graphics (duration: 15min, in French and English)
Six witnesses of time will make you relive the main historical and architectural stages of Fort l'Ecluse thanks to computer-generated images.

Langues parlées

French, English

Descriptif des services et/ou des infrastructures proposés

Sales of beverages, books on and around the fort. 

Around the fort : 
Sentiers de randonnée 
Via ferrata freely accessible with special equipment
Parcours aventure au fort supérieur

Some informations:
- The interior spaces of Fort l'Ecluse are inaccessible to persons in unaccompanied wheelchairs. LOutdoor spaces are difficult to practice for people in wheelchairs.
- The tour circuit has many stairs of different shapes and sizes.
- Access to the tour is prohibited for pets, except guide dogs and service dogs. 
- The toilets are only accessible to people with a ticket.


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