Baïse

The **Baïse** or **Grande Baïse** () is a French river that flows through the Hautes-Pyrénées, Gers and Lot-et-Garonne departments, in the Occitanie and Nouvelle-Aquitaine regions.

The river's source is in the Pyrenees and is a left tributary of the Garonne river. In general, it flows from south to north.

## Geography
The Baïse river has a length of  and a drainage basin with an area of .

Its average yearly discharge is  at Nérac, a small town of the Lot-et-Garonne department that is at about  of the confluence with the Garonne river. The largest discharges are during winter and spring, with  in February.

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**Average monthly discharge (m3/s) at Nérac**

### Course
The source of the Baïse is on the Plateau de Lannemezan, in the Capvern *commune* (Hautes-Pyrénées), at an altitude of about .

The Baïse flows through 2 regions, 3 departments and 52 *communes*. Some of the *communes* are:
* Occitanie region
** Hautes-Pyrénées : Lannemezan, Trie-sur-Baïse
** Gers : Mirande, Castéra-Verduzan, Valence-sur-Baïse, Condom
* Nouvelle-Aquitaine region
** Lot-et-Garonne : Moncrabeau, Nérac, Lavardac, Buzet-sur-Baïse

Finally, it flows into the Garonne river at Saint-Léger (Lot-et-Garonne), at  of altitude.

## Main tributaries 
* Left tributaries
** Gélise - 
* Right tributaries
** Baïsole - 
** Petite Baïse - 
** Auloue - 

## Gallery

File:Valence hafen.jpg|Port on the Baïse in Valence-sur-Baïse
File:FR-47-Nérac4.JPG|The Baïse at Nérac
File:Nérac vieux pont 4.JPG|The old bridge on the Baïse at Nérac

## Related pages
* List of rivers of France

## References 
## Other websites
* Banque Hydro - MEDDE, «Synthèse de la Banque Hydro - (O6692910)»  
* Histoire & Patrimoine des Rivières & Canaux - Rivière Baïse 
* River Baïse: Cruising in Detail