Château Guiraud is a wine estate in Sauternes, Bordeaux. It was classified as Premier Cru in the 1855 Classification and is one of the region's most famous wine estates. The château has around 85 hectares (210 acres) under vine, on sandy gravel and clay soils, which provide a good growing environment and through their moisture-retaining qualities, are conducive to the spread of Botrytis cinerea. Only grapes that have been affected by noble rot are picked by hand, and are fermented plot by plot in new oak barrels. After Château Guiraud reaches the desired level of sweetness, it is aged in barrel for at least 24 months before it is released.