Starting from Marlieu, a charming hamlet of Talissieu along the Séran River and at the foot of the Grand Colombier Massif, this nature race allows you to discover some of the hidden beauties of the Fierloz massif a stone's throw from the Cerveyrieu waterfall.
Two trail running races:
L'Aincontournable: 16.7km and 443m of elevation gain
La Vaindieu: 22.9km and 707m of elevation gain
Departure 9:30am
Registration online or on site.