Arranged at the Southern passage purpose of Zambales and the Northwestern inside of the Subic Bay territory, Olongapo City is roughly 127 kilometers (79 mi) north of Manila. The area territory of Olongapo City is 103.3 square kilometers (39.9 sq mi). The city legitimate is situated on a 6.48 square kilometers (2.50 sq mi) tidal flatland, with the rough Zambales Mountains on its three sides, and the Bataan and Subic Bay at its base. On account of this unconventional geographic area, improvement of city area is restricted. Additionally, the regional outskirts from close-by towns are not appropriately marked.