Fort du Replaton

Fort du Replaton is a military installation at 1,210 meters (4,000 feet) with extensive fortifications protecting the French entrance to the Fréjus Rail Tunnel. The complex includes barracks, ammunition storage, and gun emplacements arranged across the mountainside in a typical late 19th-century defensive layout.

The fort was built between 1884 and 1892 as part of the Séré de Rivières fortification system using the most advanced military architecture of that period. It was created to protect the new rail connection to Italy, which held strategic importance for France.

The fort's exterior shows how late 19th-century military architects designed defenses to blend with mountain terrain. The construction reflects the strategies that shaped border security in this region during that era.

The fort's interior is not open to visitors, but you can see the exterior from a walking path that starts near Loutraz. Wear sturdy shoes and be prepared for a steep uphill walk, as weather conditions at this altitude can change quickly.

An aerial cable system once connected the fort to Modane below and extended upward to Fort du Sapey at a higher elevation. This transport infrastructure was a remarkable technical solution for moving people and supplies to this remote mountain location in the late 1800s.

Location: Modane

GPS coordinates: 45.19718,6.65884

Latest update: December 12, 2025 14:22