The Abulog River or Abulug River is the 9th largest river system in the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

in terms of

watershed Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, called a "watershe ...

size."Principal River Basins of the Philippines" Published by the National Water Resources Board, October 1976 (p 12) It has an estimated drainage area of and a length of from its source in the mountains of

Apayao Apayao, officially the Province of Apayao ( ilo, Probinsia ti Apayao; fil, Lalawigan ng Apayao), is a landlocked province in the Philippines in the Cordillera Administrative Region in Luzon. Kabugao serves as its capital. The provincial capito ...

in the Cordillera Administrative Region. More than 90% of the drainage area of the river is located in

province while the remaining, including the mouth of the river, is in

Cagayan Cagayan ( ), officially the Province of Cagayan ( ilo, Probinsia ti Cagayan; ibg, Provinsiya na Cagayan; itv, Provinsiya ya Cagayan; fil, Lalawigan ng Cagayan), is a province in the Philippines located in the Cagayan Valley region, covering ...

province. The upper reaches of the Abulug River, especially upstream from Kabugao, is commonly known as the Apayao River.

References

Rivers of the Philippines Landforms of Cagayan Landforms of Apayao {{Philippines-river-stub