The Nyon–St-Cergue–Morez Railway (NStCM), French: Chemin de fer Nyon–Saint-Cergue–Morez, is a narrow gauge railway in western Switzerland which nowadays operates between Nyon, on the northern shore of Lake Geneva and the French border at La Cure, the La Cure–Morez section having closed in 1958.

The railway reaches a height of 1,228 metres (4,029 feet) above sea level at the Col de la Givrine and it is the highest in the Jura Mountains.

With the exception of the period from 1940 to 1948 this enabled direct services to operate on a daily basis, although wintertime conditions often made this a difficult feat.

It was here the line crossed the French border and again running alongside the road, passing the village of Les Rousses it duly arrived in the streets of Morez.

[1] Plans were put forward in 1999 to extend the line some 2.5 km (1.6 mi) over the French border to the village of Les Rousses but this did not prove cost effective to the communities involved and was rejected.

B7 which has been restored at the Blonay–Chamby museum railway near Montreux and another example at the Chemin de Fer Voies Ferrees du Velay in Haute Loire.