Agno River is the third largest river in Luzon (next to the Cagayan River and Pampanga River) and the sixth longest river in the Philippines. The long river Agno River traversing the provinces of Benguet and Pangasinan is also one of the largest river systems in the Country.
The river is dammed by three hydroelectric power plants namely the Ambuklao Dam in Bokod, the Binga Dam in Itogon, and the San Roque Dam in San Manuel.
The headwaters of Agno River are at the slopes of Mount Data in the Cordillera Mountains. The Agno's principal tributaries include the Pila, Camiling, Tarlac and Ambayoan Rivers. The main branch of the Agno River is Tarlac River which originates from Mount Pinatubo in Tarlac and joins the Agno River at Poponto Swamp near Bayambang.
The Agno traverses several towns in Benguet province where some 35,000 indigenous Ibaloi, Kankanaey and Kalanguya people live. The Ibaloi people of Benguet regard the river as sacred because it gives life.
Barangay Dalupirip, Itogon in Benguet province is held sacred by its people. Portions of the land serve as the burial grounds of their ancestors. The place holds great historical value and is considered one of the remaining seats of Ibaloi culture.