The Marikina River at the center of the flows approximately 11 km and has a number of tributaries in the form of creeks and rivers, draining four municipalities and one city in the Province of Rizal, and three cities in the Philippines' National Capital Region.
The Marikina River has a number of tributaries in the form of creeks and rivers, and at least one former river-section in Marikina's Barangay Tumana from which the original flow of the river has been diverted. These tributaries drain four municipalities and one city in the Province of Rizal, and three cities in the Philippines' National Capital Region.