In numbers
![38 kilometres](/UserFiles/thumbs/1400x1000/File/Annuaire/annuaire_portails/mont/mont-blanc-express-32.webp)
38 kilometres
This is the length of the Martigny-Chamonix route, comprising 18 kilometres on Swiss territory and 20 kilometres on French territory.
![90 minutes](/UserFiles/thumbs/1400x1000/File/Annuaire/annuaire_portails/mont/mont-blanc-express-13.webp)
90 minutes
The journey time between Martigny and Chamonix is 90 minutes. It takes another 45 minutes to reach St-Gervais, which is the terminus of the Mont-Blanc Express. In 1908, it took 3.5 hours to reach Chamonix from Martigny.
![1 meter](/UserFiles/thumbs/1400x1000/File/Annuaire/annuaire_portails/mont/mont-blanc-express-14.webp)
1 meter
The track gauge is 1 metre, it is a metre gauge railway (7% adhesion ramp) and rack and pinion (Strub system, 2.5 km between Vernayaz and Salvan, 20% ramp), direct current line at 850V
![12 tunnels](/UserFiles/thumbs/1400x1000/File/Annuaire/annuaire_portails/mont/mont-blanc-express-24.webp)
12 tunnels
The Martigny-Châtelard line was built in only 4 years (1902-1906) and inaugurated on 18 August 1906, it includes 6 bridges, 5 viaducts, 12 tunnels, 16 galleries. On the French side, the line was opened in 1901 from St-Gervais to Chamonix, in 1906 from Chamonix to Argentière and in 1908 from Argentière to Châtelard-Frontière. It comprises 9 tunnels.