The Vire (French pronunciation: [viʁ] ⓘ) is a river in Normandy, France whose 128 km (80 mi) course crosses the départements of Calvados and Manche, flowing through the towns of Vire, Saint-Lô and Isigny-sur-Mer,[1] finally flowing out into the English Channel.

[2] Places along the river: The generally brownish waters of the Vire are moderately alkaline having been tested by Lumina Tech as pH 8.31.

[3] The river waters are relatively turbid, with a Secchi disc measurement of 12 centimetres.

[citation needed] At the turn of the 10th century, the territorial lands of the Kingdom of Brittany had been expanded up to the Vire by their king Alan I.

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