Mieussy Viaduct

Historic site and monument
Historic patrimony

Derrière l'Office de Tourisme, Chef-Lieu, 74440 Mieussy

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The Mieussy Viaduct was built in 1931; it is 126 meters long and features a central arch with a 24-meter span that towers 20 meters above the Foron River. In the past, it carried a train connecting Annemasse to Sixt.

In 1891, a railroad line opened between Annemasse and Samoëns, serving most of the towns in the valley. At the time, the 49-kilometer journey could be completed in three hours by steam tram—twice as fast as by stagecoach. In 1933, the line was electrified and extended to Sixt-Fer-à-Cheval, providing full service throughout the valley. This modernization led to a significant increase in ridership. In the winter, the line was heavily used by residents of Geneva, who could board it in Annemasse to reach the mountains and even go skiing. Railway workers faced harsh conditions as they cleared snow from the tracks. Despite this, in 1946, the section between Saint-Jeoire and Marignier closed, and ridership continued to decline over the years. In 1959, the line finally closed permanently because no funding could be secured for the necessary renovation work. Since then, the route has been served by buses. In Mieussy, a 126-meter-long viaduct, built in 1931, still stands. Closed to motor vehicles, it can only be crossed on foot or by bicycle.