Baise

Baïse
Canal bridge over the river
Country	France
Basin features
Main source	Plateau de Lannemezan
River mouth	Garonne 44°17′5″N 0°19′17″E / 44.28472°N 0.32139°E / 44.28472; 0.32139 (Garonne-Baïse)Coordinates: 44°17′5″N 0°19′17″E / 44.28472°N 0.32139°E / 44.28472; 0.32139 (Garonne-Baïse)
Progression	Garonne→ Atlantic Ocean
Basin size	2,910 km2 (1,120 sq mi)
Physical characteristics
Length	188 km (117 mi)
Discharge	Average rate: 5 m3/s (180 cu ft/s)

The Baïse (pronounced: [baiːz]) (Occitan: Baïsa) is a 188-kilometre (117 mi) long river in south-western France, left tributary of the Garonne. Its source is in the foothills of the Pyrenees, near Lannemezan. It flows north through the following départements and towns:

It flows into the Garonne near Aiguillon.