By 1898, with the resumption of the Philippine Revolution, Baler was still reachable only by ship or by traversing on foot through nearly impassable jungle trails across the Sierra Madre mountain range that were often washed out by torrential tropical rains.
Pada tahun 1898, dengan berlangsungnya kembali Revolusi Filipina, Baler dapat dicapai hanya dengan kapal atau melalui jalan kaki melintasi jalur hutan lebat Sierra Madres yang hampir tak bisa ditembus, di mana hujan tropis lebat sering turun.