Mount Negron in the context of Mount Pinatubo

The Zambales Mountains is a mountain range in western Luzon. The mountains spread along a north-south axis, separating Luzon's central plain from the South China Sea. The range extends into five provinces: Zambales, Pangasinan, Tarlac, Pampanga, and Bataan. One of its most prominent sections is known as the Cabusilan Mountain Range composed of Mount Pinatubo, Mount Negron and Mount Cuadrado, which are believed to be remnants of the ancestral Pinatubo peak. The highest elevation in the Zambales Mountains is Mount Tapulao, also known as High Peak, in Zambales province which rises to 2,037 metres (6,683 ft).

Mount Cuadrado, also known as Mount Quadrado and Mount Quebrado, is a mountain peak located in the Cabusilan Mountains. It has a height of 1,324 m (4,344 ft), and it is located between Mount Negron and Mount Natib. Heading northwest, the part of the Philippines is Manila, approximately 80 kilometers away from the mountain. Mount Cuadrado belongs to the Cabusilan sub-range together with Mount Negron, Mount Mataba and Mount Pinatubo.