Patapat Viaduct

Patapat Viaduct is a 1.3-kilometer elevated coastal highway in Pasaleng, Pagudpud, Ilocos Norte, northern Luzon, Philippines. Hugging steep mountainsides along Pasaleng Bay, it connects the Ilocos Region with the Cagayan Valley. Completed in 1986, it is the fourth longest bridge in the Philippines. The viaduct is a major scenic landmark offering panoramic views of the West Philippine Sea, rugged coastline and the Cordillera mountains, and is a popular stop on northern Luzon road trips.

Visitors can expect an elevated concrete viaduct winding along coastal cliffs above Pasaleng Bay with the mountains on one side and the sea on the other. The site is an active highway with no pedestrian walkway; visitors typically stop at designated roadside shoulders at either end to view and photograph the structure, the coastline, and the surrounding hills. The area is open and exposed with strong sea winds and passing traffic.

Constructed from 1984 to 1986 and opened in October 1986, the viaduct was built to address frequent landslides and road closures along the coastal mountain route and to provide a reliable connection between Ilocos Norte and Cagayan Valley. At 1.3 kilometers long and 31 meters above sea level, it is recognized as the fourth longest bridge in the Philippines.

The viaduct is a well-known engineering landmark and scenic icon of Ilocos Norte, frequently featured in tourism promotions for Pagudpud and northern Luzon coastal road trips. It serves as a major viewpoint for Pasaleng Bay and the surrounding coastline.