An extension of the South China Sea, its shores were formerly the site of a major United States Navy facility, U.S.

During this period, the naval facilities were greatly built up and expanded, including a new naval air station that was built in the early 1950s by slicing the top half from a mountain and moving the soil to reclaim a part of Subic Bay.

[1][3] After the 1991 Mount Pinatubo eruption, the Americans closed the base, and the area was transformed into the Subic Bay Freeport Zone.

In 2012, controversy arose when a contracted shipping firm was accused of dumping toxic waste into Subic Bay.

The Subic Bay Metropolitan Authority created the park to supplement the income of the indigenous people.