The Fiumorbo is long. It crosses the communes of
Bastelica,
Palneca,
Ghisonaccia,
Ghisoni,
Lugo-di-Nazza,
Poggio-di-Nazza,
Prunelli-di-Fiumorbo and
Serra-di-Fiumorbo. The Fiumorbo rises in the commune of
Palneca, Corse-du-sud, to the north of the Monte Giovanni. It forms the border between Palneca and
Bastelica as it flows north, then northeast, entering the commune of
Ghisoni, Haute-Corse. It continues northeast and north through the Forêt de Marmano, then turns east to the hamlet of Sampolo, where it is dammed to form the
Réservoir de Sampolo. Below the Barrage de Sampolo it flows east through the Défilé de l'Inzecca down to the coastal plain, where it is dammed by the
Barrage de Trevadine. In this section it forms the border between Ghisoni and
Lugo-di-Nazza. Below the Barrage de Trevadine the river continues east to the commune of
Ghisonaccia, then turns south, forming the border between Lugo-di-Nazza and Ghisonaccia, then between
Poggio-di-Nazza and Ghisonaccia, and then between
Prunelli-di-Fiumorbo and Ghisonaccia. It turns to the southeast, passes between the towns of Ghisonaccia and Migliacciaro, enters the sea to the northeast of the Marais de Canna, a wetland. In the Forêt de Marmano the D69 road runs to the west of the river. From Ghisoni down to Ghisonaccia the D344 road runs to the northeast of the river. ==Reservoirs==