The MSM Mont Saint Michel trail begins in Barby, Savoie, at the base of the Massif des Bauges. This mountain and forest trail running event offers multiple distances: a 10 km Trailounet, a 17 km discovery trail, and a short trail of approximately 26 to 27 km.
The main Mont Saint Michel course measures 27 km with roughly 1,600 metres of elevation gain, making it a challenging, hilly race rather than a fast, flat one. The routes traverse the local terrain near Barby and are designed for both experienced trail runners and individuals seeking a demanding outdoor race.