Philippines / South Luzon / Geography

Area: 12,073sqkm (4,661sqmi)

Topography: rugged and mountainous except for some areas in the north and southwest which are lowlands

Mountains: Mt Labo near Imelda, Camarines Norte 942m (3,090ft); Mt Isarog near Binunuan, Camarines Sur 1976m (6463ft); Mt Mayon near Camalig, Albay 2,462m (8,078ft); Mt Bulusan near Layog, Sorsogon 1,559m (5,115ft)

Rivers: Polangui and Quinale rivers in Albay; Labo river in Camarines Norte; Bicol River in Camarines Sur; Putiao, Sonsol and Irosin rivers in Sorsogon