Cordillera Central (Luzon) Sierra Madre Mountains, the longest mountain range in the country, through the Caraballo Mountains in Nueva Vizcaya province. During Spanish colonial period, the whole range was called "Nueva Provincia", (New Province). The Cordillera Central is the highest mountain range in the Philippines. It comprises about 1/6 of the whole Luzon island with a total area of . The highest mountain in the range, Mount Pulag, is also the highest mountain on Luzon Island at . It is officially the third highest mountain in the country after Mount Dulang-dulang and Mount Apo on Mindanao Island, the second largest island of the
Mount Craddock US-ACAN redefined Mount Craddock in 2006 to apply to the southernmost peak described above. The mountain was named by US-ACAN for J. Campbell Craddock (1930–2006), leader of a University of Minnesota expedition (1962–63) that made geological investigations and cartographic surveys in the Sentinel and Heritage Ranges of the Ellsworth Mountains. During 1960–61, Craddock led a Minnesota geological expedition in examining the Jones Mountains. Mount Craddock is the second-highest point of the Craddock Massif which includes Mount Rutford (highest point), Rada Peak, and Bugueño Pinnacle. Rutford was named for R. H. Rutford, Antarctic geologist and colleague of Craddock. Rada Peak and