Philippines / Northeast Luzon / Geography

Land Area: 25,942sqkm (10,016sqmi)

Topography: generally rugged except for the northeast portion which is mountainous

Mountains: Mt Cetaceo near Penablanca, Cagayan 1,840m (6,037ft); Mt Dos Cuernos near San Pablo, Isabela 1,784m (5,853ft); Mt Anacuao near Casiguran, Aurora 1,852m (6,076ft)

Rivers: Cagayan river in Cagayan and Isabela