The Mulaz train station was one of six stations on the Bellegarde-Chézery line and served the hamlets of la Mulaz and la Serpentouze. The Tram Line linked the villages in the Valserine valley with Bellegarde and provided opportunities to both inhabitants and companies. The line’s three engines also pulled freight wagons and opened-up the sawmills of Chézery and Champfromier, the plaster factory in Pré-Basson and the asphalt mines in Forens.