This circuit is going to make discover you 3 mythical collars of the Valley of Aure and Louron: Aspin, Hourquette d' Ancizan and Azet Val Louron. If the collar of Aspin is certainly the most known, the collar of Hourquette deserves well the effort spent with regard to the landscapes and with regard to its view on the peak of Arbizon. In the passage you will discover the attractive city of Arreau and its market hall, as well as the lake of Payolle and its forests of fir trees.