The Montenvers Railway is a rack railway line in the Haute-Savoie region of France. The line runs from a connection with the SNCF, in Chamonix, to the Mer de Glace, at an altitude of 1,913 m (6,276 ft).
The line is 5.1 km (3.2 mi) long. It is a rack and adhesion railway, using the Strub rack system to overcome a height difference of 871 m (2,858 ft). Except for the terminal stations, which are operated in adhesion mode, the line has a gradient varying from 11% to 22%.
