The Fort du Replaton is a fortification of the Séré de Rivières system in Modane, France. The fort was built to provide artillery cover for the French end of the Fréjus Rail Tunnel away horizontally. It is connected to Modane by an aerial tram, which continues on from Replaton to the Fort du Sapey on a much higher eminence. A renovation project in 1930 added 75mm guns in place of the 95mm weapons. The fort was fired upon in 1940 and 1944. It is presently the property of the Association de la Traversée es Alpes. It is not presently open to the public, but is in a good state of preservation.