The Hers-Vif, also named Grand Hers or simply Hers, is a 135-kilometre long river in southern France, right tributary of the Ariège. The Hers-Vif rises at an elevation of about 1,500 metres near the Chioula Pass of the Pyrenees, approximately 6 kilometres north of Ax-les-Thermes. It is the major tributary of the Ariège into whose right bank it flows 2 kilometre…The Hers-Vif, also named Grand Hers or simply Hers, is a 135-kilometre long river in southern France, right tributary of the Ariège. The Hers-Vif rises at an elevation of about 1,500 metres near the Chioula Pass of the Pyrenees, approximately 6 kilometres north of Ax-les-Thermes. It is the major tributary of the Ariège into whose right bank it flows 2 kilometres upstream from Cintegabelle in the Haute-Garonne.