Cagayan River
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![Upstream Cagayan River at Lamut bridge in Dupax del Norte](/Images/godic/202502/07/LamoBridgeDupaxdelNorte,Nueva_Vizcayajf6996_110857.JPG")
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The Cagayan River, also known as the Rio Grande de Cagayan, is the longest and largest river in the Philippine Archipelago. It is located in the Cagayan Valley region in northeastern part of Luzon Island and traverses the provinces of Nueva Vizcaya, Quirino, Isabela and Cagayan.