Ciron

For the commune in the Indre department, see Ciron, Indre.

The Ciron (French pronunciation: [siʁɔ̃]; Occitan: Siron) is a left tributary of the Garonne, in Gironde, Southwest France. It is 96.9 km (60.2 mi) long.^[1]

Ciron
Location
Country	France
Physical characteristics
Source
• location	Landes
• elevation	135 m (443 ft)
Mouth
• location	Garonne
• coordinates	44°36′3″N 0°18′5″W
Length	97 km (60 mi)
Discharge
• average	3 m3/s (110 cu ft/s)
Basin features
Progression	Garonne→ Gironde estuary→ Atlantic Ocean

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 Garonne at Barsac, downstream from Langon.

The moisture it brings, and morning mists it causes, are favorable to the development of Botrytis cinerea on grapes, a fungus 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 (47)
• Gironde (33) : Noaillan, Villandraut, Barsac, Cérons, Bommes

Tributaries

• (L) le Giscos, from Giscos
• (R) le Barthos,
• (L) la Gouaneyre, from Captieux
• (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