Fort du Risoux

Fort du Risoux stands at 1273 meters altitude on a promontory within the Risoux forest, overlooking Lake des Rousses in the Jura massif.

The fort, constructed between 1880 and 1884 as part of the Séré de Rivières defense system, contained 16 artillery platforms and accommodations for 400 military personnel.

The fortification represents late 19th-century French military architecture with its pentagonal shape, defensive ditches, and specialized caponniers for strategic defense positions.

Visitors can access the fort through a 9.2-kilometer hiking trail from Les Rousses, with an elevation gain of 324 meters taking approximately 3 hours and 35 minutes.

The fort features a historical construction ramp called 'la ficelle' that was used to transport building materials from Lake des Rousses during its initial construction.

GPS coordinates: 46.50970,6.07711

Latest update: June 23, 2025 09:49