
A nant is a term used to describe a mountain stream. This environment is very difficult for aquatic life. Here you will cross a maze of watercourses ( the Perrière stream, the Cuttaz brook and, further on, the Nant Taffon) that feeds the Giffre, a tributary of the Arve and a sub-tributary of the Rhône. The Giffre originates in the Sixt-Fer-à-cheval nature reserve.