The Dinadiawan River Protected Landscape is a protected area covering the stretch of the Dinadiawan River from its headwaters in the Sierra Madre mountain range to its mouth on the Philippine Sea coast of the village of Dinadiawan in Aurora province, Philippines.

The park covers an area of 3,371.332 hectares (8,330.74 acres) and includes its surrounding forested mountains, waterfalls and springs in Dipaculao municipality.

[1] Its forest cover consists primarily of dipterocarp trees like tanguile, mayapis, white lauan, red lauan and bagtikan.

[2] First established as a watershed forest reserve with an area of 3,387 hectares (8,370 acres) through Proclamation No.

[3][4] The park is one of five protected areas in the province of Aurora.