Sibalom Natural Park is a 5,511.47-hectare (13,619.1-acre) protected area in the Philippines on the island of Panay

The park has a mild montane forest, a lowland forest, some bushland and open cogon or grassland.[2] Its riverbeds contain semi-precious gemstones such as agate, jasper and onyx.[5]
About 5,000 hectares of forest in Sibalom from Mount Porras extending to Mount Igmatindog, covers Sibalom River and its tributaries. Of this forest, 672 hectares are undisturbed by any human activity while about 4,223 hectares constitutes the 50-year-old reforestation site

One of the main highlights is the large flower Rafflesia speciosa, discovered in Mount Porras and surrounding barangays in 2002[6]
The Philippine dipterocarp trees such as white lauan and apitong, and fruit trees such as antipolo and malapaho are found in the forests of Sibalom. The globally endangered giant flower, the Rafflesia speciosa, also blooms in the park.