The Tarlac River is a river in the Philippines, located in the province of Tarlac. It is visible from the dike near the Tarlac City Wet Market. It was formerly the site of traditional balsa or bamboo raft riding, until the river was heavily silted by sticky lahar or mud flow brought by Mt. Pinatubo on its major eruption on June 15, 1991, filling the river with over 10 feet of lahar. Its main tributary is the O'donnel river in Sta. Lucia Capas, Tarlac, the river itself originates from Mount Pinatubo and empties itself into the Agno River in Pangasinan. Tarlac river is dammed at Barangay Tibag in Tarlac city where it's water is used for irrigation and distributed to the northern and central regions of Tarlac, the rest of the river is now a bed of sand.
The river was once a good source of Fish and Water used for irrigation, the irrigation system now takes just about "all" of the remaining water and distributes it to Matatalaib and Maliwalo Tarlac etc. The River bed is also being used as a source of Sand and Stones that can be used as construction material.