Mountain Province is a landlocked province of the Philippines in the Cordillera Administrative Region in Luzon. Its capital is Bontoc while Bauko is the largest municipality. Mountain Province was formerly referred to as Mountain in some foreign references. The name is usually shortened by locals to Mt. Province.

The province was named so for being in the Cordillera Central mountain range found in the upper realms of Luzon island.

Mountain Province was also the name of the historical province that included most of the current Cordillera provinces. This old province was established by the Philippine Commission in 1908, The first serious effort to subjugate them was made in 1785 when soldiers were sent from Cagayan to put down a revolt of the Kalingas. A famous Spanish explorer, Guillermo Galvez, conducted more than 40 forays to the mountainous region.

Formerly called La Montañosa by the Spanish colonizers due to its mountainous terrain, the area was subdivided into 6 comandancias politico-militar.

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|+The 6 former Comandancias Politico-Militar of La Montañosa

The first governor was Samuel Kane, and the town of Bontoc was made the capital. It was originally composed of the sub-provinces of Amburayan, Apayao, Benguet, Lepanto-Bontoc, Ifugao and Kalinga.

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|+Historical sub-provinces of Mountain Province under Act No. 1876 However, the indigenous peoples of Kalinga Province and Mountain Province resisted the project and when hostilities resulted in the murder of Macli-ing Dulag, the project became unpopular and was abandoned before Marcos was ousted by the 1986 People Power Revolution.

On June 15, 1987, the Cordillera Administrative Region was established upon the issuance of Executive Order 220 by then-President Corazon Aquino, and Mountain Province was made one of its provinces.

Indigenous People's Day

Through Presidential Proclamation 682, October 4, 2024 was declared a special non-working day to commemorate the Provincial Indigenous People’s Day.

Geography

Mountain Province covers a total area of occupying the central section of the Cordillera Administrative Region in Luzon. The province is bordered on the north by Kalinga, east by Isabela, south by Ifugao, southwest by Benguet, west by Ilocos Sur, and northwest by Abra.

Situated within the Cordillera Central, Mountain Province is 83% mountainous while 17% make up hills and levels. The province has many rivers, waterfalls, mountains, and caves. The central and western areas of the province are characterized by rugged mountains and steep cliffs, while the eastern portion has generally sloping terrain.