The Ciron (; oc, Siron) is a left tributary of the

Garonne The Garonne (, also , ; Occitan, Catalan, Basque, and es, Garona, ; la, Garumna or ) is a river of southwest France and northern Spain. It flows from the central Spanish Pyrenees to the Gironde estuary at the French port of Bordeaux – a ...

, in

Gironde Gironde ( US usually, , ; oc, Gironda, ) is the largest department in the Nouvelle-Aquitaine region of Southwestern France. Named after the Gironde estuary, a major waterway, its prefecture is Bordeaux. In 2019, it had a population of 1,62 ...

, Southwest

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

. It is long.

Geography

The Ciron rises in the eastern end of the Moors of Gascony, in Landes. It flows north-west, mainly through the moors of Gironde, crosses the Sauternes vineyard and joins the

at Barsac, downstream from Langon. The moisture it brings, and morning

mist Mist is a phenomenon caused by small droplets of water suspended in the cold air, usually by condensation. Physically, it is an example of a dispersion. It is most commonly seen where water vapor in warm, moist air meets sudden cooling, such a ...

s it causes, are favorable to the development of ''

Botrytis cinerea ''Botrytis cinerea'' is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as "botrytis bunch rot"; in horticulture, it is usually called "grey mould" or ...

'' on grapes, a

fungus A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...

that contributes to the high quality and renown of Sauternes wines.

Départements and towns

The Ciron flows through the following ''départements'' and towns: * Landes (40) : Lubbon *

Lot-et-Garonne Lot-et-Garonne (, oc, Òlt e Garona) is a department in the Nouvelle-Aquitaine region of Southwestern France. Named after the rivers Lot and Garonne, it had a population of 331,271 in 2019.Gironde Gironde ( US usually, , ; oc, Gironda, ) is the largest department in the Nouvelle-Aquitaine region of Southwestern France. Named after the Gironde estuary, a major waterway, its prefecture is Bordeaux. In 2019, it had a population of 1,62 ...

(33) : Noaillan, Villandraut, Barsac, Cérons,

Bommes Bommes (; oc, Bòmas) is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France. Bommes is located in the Sauternes wine appellation of Bordeaux. Population See also *Communes of the Gironde department The foll ...

Tributaries

* (L) le Giscos, from Giscos * (R) le Barthos, * (L) la Gouaneyre, from

Captieux Captieux (; oc, Capsiuts) is a commune of Southwestern France, located in the Gironde department, Nouvelle-Aquitaine (before 2015: Aquitaine). It lies near the border with the Landes and the Lot-et-Garonne departments. The commune is in the ...

* (R) la Clède, from Lignan-de-Bazas * (L) le Baillon, downstream from Villandraut * (L) la Hure, from Saint-Symphorien ** (L) l'Origne from Origne and Balizac * (L) le Tursan, from Guillos * (L) la Mouliasse, from Landiras ''N.B. : (R) = right tributary; (L) = left tributary''

References

{{Authority control Rivers of France Rivers of Lot-et-Garonne Rivers of Landes (department) Rivers of Nouvelle-Aquitaine