River in Cagayan Valley, Philippines Abulog River Abulog River mouth Show map of Luzon Abulog (Philippines) Show map of Philippines Location Country Philippines Region Cordillera Administrative Region Cagayan Valley Province Apayao Cagayan Physical characteristics Source • location Apayao Mouth • elevation 0 m (0 ft) Length 196 km (122 mi) Basin size 3,372 km2 (1,302 sq mi) Depth • minimum 200 m3/s (7,100 cu ft/s) Discharge • location Babuyan Channel