Santiago–Tuguegarao Road

Santiago–Tuguegarao Road
The Quezon, Isabela-segment of Santiago–Tuguegarao Road.
Route information
Length	130 km (81 mi)
Component highways	N51
Major junctions
North end	N1 / AH 26 (26) (Maharlika Highway) – Tuguegarao City, Cagayan
Major intersections	N52 (Kalinga–Cagayan Road) – Enrile, Cagayan N220 (Cabagan–Santa Maria Road) – Santa Maria, Isabela N53 (Cauayan–Cabatuan Road) – Cabatuan, Isabela N224 (National Highway Junction–Potia Road) – Ramon, Isabela
South end	N1 / AH 26 (26) (Maharlika Highway) – Santiago
Location
Country	Philippines
Major cities	Tuguegarao, Santiago
Highway system
Roads in the Philippines Highways Expressways List
← N11 → N52

Santiago–Tuguegarao Road is a national primary road in the provinces of Cagayan and Isabela in the Philippines. It is a bypass junction of the Pan-Philippine Highway, connecting to the cities of Tuguegarao and Santiago. The entire road is designated as National Route 51 (N51) of the Philippine highway network.

Buntun Bridge in Cagayan, which carries along the route.