DENR Region 2 is presently located at #14 Dalan Na Pagayaya corner Angicacua, Regional Government Center, Carig Sur, Tuguegarao City. It covers five provinces (Cagayan, Isabela, Nueva Vizcaya, Quirino and the island province of Batanes), four (4) cities (Tuguegarao in Cagayan and Ilagan, Cauayan and Santiago in Isabela) and 89 municipalities and 2,311barangays. Bounded by three mountain ranges, the Sierra Madre Mountains on the east, Cordillera Mountains on the west, and the Caraballo Mountains on the south, it is criss-crossed by the historical Cagayan River, the longest river and the largest basin in the country. The Cagayan River has a total stretch of about 410 kilometers, a drainage area of 2,811,000 hectares and 1,200,000 ha of major ground water resources.