The Bigbiga Protected Landscape (also spelled Bigbigga) is a protected landscape of forested hills, open grasslands and natural springs in Ilocos Sur in the northwestern part of the island of Luzon, Philippines.

The park has a total area of 135.71 hectares (335.3 acres) located entirely within the municipality of Narvacan.

[1] It was created in 1939 as the Bigbiga Spring Watershed Forest Reserve by virtue of Proclamation No.

It is hilly to mountainous with slope ranging from 30 to 50 percent and maximum elevation of between 100 metres (330 ft) and 200 metres (660 ft) above sea level.

Letac Creek borders it to the south which supplies water to the three sitios of Marozo.