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Gélise facts for kids

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The Gélise river at Barbaste
Country France
Regions Occitanie, Nouvelle-Aquitaine
Department Gers, Landes, Lot-et-Garonne
Communes Demu, Eauze, Sos, Poudenas, Mézin, Barbaste
 - left Rimbez, Gueyze
 - right Izaute, Auzoue, Osse
City Nérac
Source Pyrénées
 - location Lupiac, Gers, France
 - elevation 215 m (705 ft)
 - coordinates 43°41′02″N 0°10′38″E / 43.68389°N 0.17722°E / 43.68389; 0.17722
Mouth Baïse
 - location Lavardac, Lot-et-Garonne, France
 - elevation 40 m (131 ft)
 - coordinates 44°10′47″N 0°17′18″E / 44.17972°N 0.28833°E / 44.17972; 0.28833
Length 92 km (57 mi)
Basin 2,910 km² (1,124 sq mi)
Discharge for Mézin
 - average 4.72 /s (167 cu ft/s)

The Gélise is a river of south-western France that flows through the Gers, Landes and Lot-et-Garonne departments, in the Occitanie and Nouvelle-Aquitaine regions. It is a left tributary of the Baïse river.


The Gélise has a length of 92 km (57.2 mi), and a drainage basin with an area of approximately 2,859 km2 (1,104 sq mi).

Its average yearly discharge (volume of water which passes through a section of the river per unit of time) is 4.72 cubic metres per second at Mézin.


The Gélise starts in the place known as Cahuzères in the commune of Lupiac, Gers department, at an elevation of about 215 m (705 ft). It flows to the northwest and then, after Castelnau-d'Auzan, turns to the northeast.

It joins the Baïse on its left bank at Lavardac, at about 40 m (131 ft) of altitude.

The Gélise flows through 21 communes. It passes through the following regions, departments and communes:

Main tributaries

The main tributaries of the Gélise river are:

  • Left tributaries
    • Rimbez - 16.4 km;
    • Gueyze - 17.7 km;
  • Right tributaries
    • Izaute - 37.5 km;
    • Auzoue - 74.1 km;
    • Osse - 120.2 km;

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