




A high-altitude redoubt built between 1890 and 1902 as part of the Séré de Rivières fortification system and then reinforced between 1936 and 1940, it played a major part in the Battle for the Alps in June 1940 due to its strategic frontier position.
Free of charge.
La Rosière Tourisme - 28/10/2025
www.larosiere.net
Report a problem
All year round, daily. Winter season: accessible via the "Espace San Bernardo" ski area Summer season: accessible to hikers and mountain bikers, subject to weather conditions. Spring/ autumn: ask in the Tourist Office.
Phone : 04 79 06 80 51
Email : info@larosiere.net
Website : https://www.larosiere.net
Facebook : https://fr-fr.facebook.com/la.rosiere.1850
Twitter : https://twitter.com/La_Rosiere1850
From La Rosière, take the Roches Noires Express chairlift to the 'Roc Noir' lookout point (at an altitude of 2,346m). Le Roc Noir is an ideal picnic spot, boasting a panoramic map and breathtaking views of the surrounding area. From the Roc Noir, take the path that leads to the Traversette pass: it is an easy 40-minute walk (one way). From the Fort, you can enjoy a 360° panoramic view over the Petit-Saint-Bernard pass and the Mont-Blanc massif.