The Aveyron (in Occitan Avairon) (not to be confused with a small river in Loiret, also named Aveyron) is a 291 km long river in southern France, in the Occitania region, which flows through the departments of Aveyron, Tarn and Tarn-et-Garonne.

It is a right tributary of the Tarn river, and therefore a sub-tributary of the Garonne.

It rises in the southern Massif Central, near Sévérac-le-Château.

The Aveyron flows through thirty-nine hydrographic zones covering an area of 15,100 km2.

The Aveyron is an abundant river, powerfully fed by heavy rainfall over most of its watershed. The water level in its watershed is 347 millimeters per year, which is higher than the average for France as a whole (more or less 320 millimeters per year), but lower than the average for the Garonne basin (374 millimeters per year at Tonneins). The river’s specific discharge (or Qsp) is 14.7 liters per second per square kilometer of basin.

Main sights

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