In 1896, a Katipunan cell was organized in the home of Teodoro Lim in Poblacion, San Miguel, Bulacan.  These young freedom fighters launched the first attack against the Spaniards on 16 November 1896 under Kapitan Mariano Llanera of Cabiao, Nueva Ecija.  The offensive resulted in heavy casualties.  Melecio Carlos then suggested the establishment of a safe base in the rugged terrain of Biak na Bato.  The freedom fighters organized themselves in Biak na Bato as Balangay Araw ng Katipunan.  The natural fortress ensconced in the forests and caves of the mountain range provided abundant food and water supply.  

Impregnable Biak na Bato also provided safe haven for Gen. Aguinaldo's battle-weary troops from Cavite which later joined Llanera's contingent to harass Spanish forces in Central Luzon.  On 31 May 1897, the Biak na Bato Republic was established with Aguinaldo becoming its President.  Spirits ran high as the constitution of Biak na Bato was approved in the forest stronghold on 1 November 1897.  Field commanders and officers of the Revolution travelled to the mountain to confer with the President.

Today, Biak na Bato National Park is a prime ecotourism site in Bulacan because of its rich historical and ecological heritage.  The rugged terrain with thick vegetation, abundant water supply, magnificent caves made Biak na Bato an ideal respite for the weary souls needing renewed strength much as Gen. Aguinaldo experienced 100 years ago.

Water is abundant in Biak na Bato.  The fresh clear water of Balaong River, which flows from the south are ideal for swimming and fishing.  Numerous springs along the river banks provide clean drinking water.    Its clear water has been inviting tourists as early as 1800's from as far as Nueva Ecija and Pampanga.