
Southeast
Upper Marikina River Basin Protected Landscape: Watershed Geography and Sierra Madre Mapping
A critical forest reserve and hydrological basin in Rizal
Covering the upper reaches of the Marikina River, this protected landscape forms a massive forested block within the southern Sierra Madre. The area serves as a primary catchment system, defined by its rugged mountain ridges, descending river corridors, and long-standing role in regional water management. Mapping these protected lands reveals the essential link between mountain ecosystems and downstream hydrological stability.
- Area
- 261.256 km²
- Established
- 1904
- IUCN
- V
- Relief
- Mountain







