Established in 1978, the park covers 5019 hectares of the southern-central portion of the island of Upolu on the border of the Atua and Tuamasaga districts.

The park extends from Mount Fito, the highest mountain on Uplou, to the coast, and includes uplands, valleys, marshes, the O Le Pupu lava field, and coastal cliffs.

[7]: 6  In 2008 an adjoining forestry project was incorporated, as well as the Togitogiga Recreational Reserve, expanding the park to 5019 hectares.

[8] The park extends from Mount Fito and Mount Le Pu’e on Upolu's central ridge to the coast, taking in the entire range of forest types found on Upolu.

[9] In the wake of cyclones Ofa and Val 10% of the park area has been taken over by the invasive Merremia plant.