The Mare (French pronunciation: [maʁ] ⓘ) is a 29.5 km (18.3 mi) river in the Hérault department in southern France,[1] which rises in the Caroux-Espinouse hills.

The river's source is above Castanet-le-Haut in the Parc naturel régional du Haut-Languedoc.

The river passes through Saint-Gervais-sur-Mare and Villemagne-l'Argentière, before joining the Orb at Hérépian.

The river passes through the following communes, from source to mouth:

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