The Agno River, also known as the Pangasinan River, is a river on the island of Luzon in the Philippines. Traversing the provinces of Benguet, Pangasinan, and Tarlac, it is one of the largest river systems in the country, with a drainage area of . The river originates in the Cordillera Mountains and empties into the South China Sea via Lingayen Gulf. The river is long, making it the sixth longest river in the country. Roughly two million people live in the Agno River Valley, and it comprises o…