Old folks said that the name Sierra Bullones was taken from the Spanish words “Sierra” meaning mountain and “Bullones” meaning bullions of gold. During the Spanish colonization, wealthy Spaniards were said to have buried bullions of gold somewhere between the barangays of Dusita and Canta-ub.

Another version of the name was advanced by a group of young and intelligent people. They said that the word “Bullones” is a Spanish term for fog. It means that the Sierra Bullones meant “foggy Mountains”. This theory might hold water judging from the appearance of the forest, which is at times cool and foggy. Still, another interpretation claims that “Sierra” means series and “Bullones” means cave. Hence Sierra Bullones is a place with a series of caves.

In its early of town hood, Sierra Bullones was economically stable. Food was abundant and root crops were also plenty. The Wahig River was a good source of water to nourish the fields. It was also good sources of fresh fishes like mudfish (hawan) and catfish (pantat).

The vicinity of Poblacion was a forest where wild grasses abound in the densely wooded neighborhood. In the beginning there were only five (5) barrios namely: Candagas (now Poblacion), Canta-ub, Danicop, Bugsoc, and Abachanan. Years later, the forested boundaries were moved upwards as farmers continue to clear the area for cultivation and a site for human settlements.