Editing Luzon (section)

==== Northern Luzon ====
The northwestern portion of the island, which encompasses most of the [[Ilocos Region]], is characterized by a flat terrain extending east from the [[coast]]line toward the [[Cordillera Central, Luzon|Cordillera Central mountains]].

The Cordillera mountain range, which feature the island's north-central section, is covered in a mixture of [[Luzon tropical pine forests|tropical pine forests]] and [[Luzon rainforest|montane rainforests]], and is the site of the island's highest mountain, [[Mount Pulag]], rising at 2,922 metres. The range provides the upland headwaters of the [[Agno River]], which stretches from the slopes of [[Mount Data]], and meanders along the southern Cordillera mountains before reaching the plains of [[Pangasinan]].

The northeastern section of Luzon is generally mountainous, with the [[Sierra Madre (Philippines)|Sierra Madre]], the longest mountain range in the country, abruptly rising a few miles from the coastline. Located in between the Sierra Madre and the Cordillera Central mountain ranges is the large [[Cagayan Valley]]. This region, which is known for being the second largest producer of rice and the country's top corn-producer, serves as the [[Drainage basin|basin]] for the [[Cagayan River]], the longest in the Philippines.

Along the southern limits of the Cordillera Central lies the lesser-known [[Caraballo Mountains]]. These mountains form a link between the Cordillera Central and the Sierra Madre mountain ranges, separating the Cagayan Valley from the [[Central Luzon]] plains.<ref name=TriumphPhil>{{cite book|last1=Smith|first1=Robert Ross|title=Triumph in the Philippines|date=1993|publisher=University Press of the Pacific|location=Honolulu, HI|isbn=1410224953|page=450|url=http://www.ibiblio.org/hyperwar/USA/USA-P-Triumph/USA-P-Triumph-24.html|access-date=25 December 2014|format=Transcribed and formatted by Jerry Holden for the HyperWar Foundation|archive-date=January 25, 2015|archive-url=https://web.archive.org/web/20150125082009/http://www.ibiblio.org/hyperwar/USA/USA-P-Triumph/USA-P-Triumph-24.html|url-status=live}}</ref>

===== Image gallery =====
<gallery widths="200" heights="150">
View of the north coast of Luzon - ZooKeys-266-001-g002.jpg|North coast of Luzon along the [[Cagayan]]-[[Ilocos Norte]] boundary
Mount Pulag, Kabayan, Philippines (Unsplash).jpg|Summit of [[Mount Pulag]], Luzon's highest mountain
FvfSanJuanLaUnion8559 10.JPG|West coast of Luzon at [[San Juan, La Union|San Juan]] overlooking the [[South China Sea]]
View of the Sierra Madre from the west - ZooKeys-266-001-g004.jpg|The Cagayan Valley at [[Cabagan, Isabela|Cabagan]] with the [[Sierra Madre (Philippines)|Sierra Madre]] mountains in the background
Quirino 1.jpg|Canoes along upstream [[Cagayan River]] at [[Quirino]] province
</gallery>