Mountain Province is part of the Cordillera Administrative Region. It consists of ten municipalities, including Bontoc, its capital, and Sagada. It was named as such because it is in the Cordillera Central mountain range of Northern Luzon.
We were able to explore this province during our 3-day Sagada-Bontoc-Banaue Holy Week trip. You may view our itinerary and other details here: https://couplemeetsworld.wordpress.com/2015/04/07/sagada/