The Drac is a 130 km long river in southeastern France, left tributary of the Isère. It is formed by the confluence of the Drac Noir and the Drac Blanc, that both rise in the southern part of the Massif des Écrins. It flows through several reservoirs, including the Lac de Monteynard-Avignonet. It flows into the Isère near Grenoble. Its major tributary is the Romanche.
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