The Guiers Vif (French pronunciation: [ɡje vif], literally live Guiers) is a river in Auvergne-Rhône-Alpes in eastern France.

[1] It is located in the Regional Natural Park of Chartreuse, on the border between the municipalities of Saint-Pierre-d'Entremont (Isère) and Saint-Pierre-d'Entremont (Savoie).

For most of its course, the river forms the border between the departments of Isère and Savoie.

Near the communes of Entre-deux-Guiers and Les Echelles, it ends after 16.9 km (10.5 mi) as a right tributary of the Guiers.

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