The Ubaye (French pronunciation: [ybaj]; Occitan: Ubaia) is a river of southeastern France.

It is 83 kilometres (52 mi) long and flows through the Alpes-de-Haute-Provence department.

[2] Its rises at the Col de Longet, in the Cottian Alps on the border with Italy.

It flows into the Lac de Serre-Ponçon (which is fed and drained by the Durance) near La Bréole.

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