The Guil () is a long river in the Hautes-Alpes département, southeastern France. Its drainage basin is .Bassin versant : Guil (Le), Observatoire Régional Eau et Milieux Aquatiques en PACA Its source is several small streams which converge into the lake Lestio, at Ristolas. It flows generally west, through the Queyras. It is a left tributary of the Durance into which it flows at Guillestre.
Communes along its course This list is ordered from source to mouth: Ristolas, Abriès, Aiguilles, Château-Ville-Vieille, Arvieux, Eygliers, Guillestre
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