Cagayan Valley Road is northernmost road in
Cagayan that connects Aparri to Tuguegarao, running in parallel to
Cagayan River, the country's longest river. It also refers to the alternate name of Maharlika Highway that reaches south up to the
Central Luzon province of
Bulacan.
Aparri to Lal-lo The road's Junction Aparri Airport–Port section starts as Loriga Gallarza Street at the Aparri Port in the northern coastal town of
Aparri that also serves ferries to
Batanes. It traverses the town proper and turns south as De Rivera Street. At the intersection with Rizal Street (Aparri Airport Road), N103 ends and the route number changes to N101, which it continues from the intersecting road. There, the road's Magapit–Aparri Road section commences. It then traverses the towns of
Camalaniugan and
Lal-lo. == History ==