The Patapat Viaduct, also known as the Patapat Bridge, is a viaduct in Pagudpud, Ilocos Norte, a coastal resort town in the northernmost tip of the island of Luzon in the Philippines. The bridge is elevated 31 meters over sea level. It is a concrete coastal bridge 1.3 kilometers long, 9.42 meters wide, and connects the Maharlika Highway and the MacArthur Highway from the Ilocos Region to Cagayan Valley. The viaduct was constructed by Hanil Development Co. Ltd. under the overall management of DPWH-PMO-PJHK and was completed and opened to traffic in October 1986.