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Country France
Basin features
Main source Vic-Bilh
River mouth Léez
Progression LéezAdourAtlantic Ocean
Physical characteristics
Length 35 km (22 mi)

The Larcis (Occitan: Arsís) is a river in Southwestern France. It is a right tributary of the Léez, originating from the Vic-Bilh in the east of the Pyrénées-Atlantiques.

It joins the Léez in Lannux, in the French département of the Gers.


It shares its name with a tributary of the Estéous. The name of the Arcison, a left tributary of the Layon, is related.

Main tributaries[edit]

  • (L) Lizo,
  • (L) Léès, from Saubole.


Coordinates: 43°41′N 0°13′W / 43.683°N 0.217°W / 43.683; -0.217