The Gave d'Oloron is a river of south-western France near the border with Spain. It takes its name from the city Oloron-Sainte-Marie, where it is formed from the rivers Gave d'Aspe and Gave d'Ossau.
It joins the Gave de Pau (left tributary) in Peyrehorade. The 10 km stretch between this confluence and the confluence with the Adour is called Gaves Réunis (united Gaves).
The Gave d'Oloron is used for fishing.
The Gave d'Oloron flows through the following départements and towns:
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