In Spanish, the term “Sierra Madre” means “Mother Mountains”. It is the longest mountain range in the country with a length of 800 kilometers which runs over the provinces of Cagayan, Isabela, Quezon, Nueva Vizcaya, Aurora, Nueva Ecija, Bulacan, Laguna, Rizal, Metro Manila, and Quezon. The Dumagats believe that the world started on the highlands of Sierra Madre instead of the lower plains, and the world will end atop as the plains submerge and the mountains remain.