The Isle is a 255-kilometre long river in south-western France, right tributary of the Dordogne. Its source is in the north-western Massif Central, near the town Nexon. It flows south-west through the following départements and towns:
Haute-Vienne: Le Chalard
Dordogne: Périgueux, Mussidan
Gironde: Libourne
It flows into the Dordogne in Libourne. From Wikipedia