From Vaudagne to les Houches, via the Sainte-Marie viaduct
Starting from Vaudagne, the slopes ease (20 mm/m). The track crosses forests, and then it progresses on a ridge. Not long before les Houches, the track crosses the Arve valley on the most impressive structure of the line, the Sainte-Marie viaduct.
On on-demand stop is located just before the viaduct (kilometer 10.619). It is aptly called Viaduc Sainte-Marie.