What is "hirmentaz"

Hirmentaz (pronounced irminte) is a mountain in eastern France, belonging to the Chablais Alps, and located in the communes of Bellevaux, Habère-Poche, Habère-Lullin and Mégevette. Two ski stations have been set up on its slopes, one, also called Hirmentaz, in the Bellevaux commune, and the other, called Domaine des Habères, in the communes of Habère-Poche Habère-Lullin.