Abra River is the 6th largest river system in the Philippines

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

 in terms of watershed size. It has an estimated drainage area of 5,125 square kilometers and a length of 178 kilometers from its source in the vicinity of Mount Data in the Benguet

Benguet

Benguet is a landlocked province of the Philippines in the Cordillera Administrative Region in Luzon. Its capital is La Trinidad and borders, clockwise from the south, Pangasinan, La Union, Ilocos Sur, Mountain Province, Ifugao, and Nueva Vizcaya....

province.

Geography

The Abra river originates from the southern section of Mount Data. It descends westward to Cervantes, Ilocos Sur and flows to the province of Abra. At a point near the municipality of Dolores, it is joined by the Tineg river, which originates from the uplands of Abra.