Santiago–Tuguegarao Road
national road in the Philippines
Santiago–Tuguegarao Road is a major national primary road in the provinces of Cagayan, Kalinga, and Isabela in the Philippines. It is a bypass road of the Pan-Philippine Highway, also known as Cagayan Valley Road, connecting to the cities of Tuguegarao and Santiago.
The road is designated as National Route 51 (N51) of the Philippine highway network.
History
Route description
Santiago to Cabatuan
Santiago–Tuguegarao Road starts at Mabini Junction, a roundabout intersection with Maharlika Highway and R.C. Miranda Road in Barangay Mabini, Santiago City. Heading north, it then runs straight to the north where it traverses the municipalities of Ramon, San Mateo, and Cabatuan in Isabela.
Cabatuan to Santa Maria
At the poblacion of Cabatuan, the road turns north at its intersection with Santiago–Tuguegarao Bypass Road, where the Triangle Park is situated. It then crosses the Magat River vis Magat Bridge and traverses the municipalities of Aurora, San Manuel, Roxas, Mallig, and Quezon in Isabela before entering the province of Kalinga. In Kalinga, it traverses the lowland municipalities of Tabuk, the province's capital, and Rizal, away from their poblacions. It then re-enters Isabela and traverses the municipalities of Santo Tomas and Santa Maria.
Santa Maria to Tuguegarao
In Santa Maria, Isabela, the road makes a sharp left turn at its intersection with Cabagan–Santa Maria Road.
“Santiago–Tuguegarao Road” enters the record as national road in the Philippines. Crown Archives preserves that source wording while asking what Santiago, Tuguegarao and Road can confirm, complicate or overturn.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 4, 2026. The linked authority identifier is Q47089887. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Santiago–Tuguegarao Road” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.