The Park has over 80 streams and rivers, the largest of which are Casanare, Playón, Mundo Nuevo, Mortiñal, San Lope, Purare, Tame, Cravo Norte and Cusay; and around 150 lagoons of spectacular beauty. The protected area and its zone of influence have a series of 48 micro-basins, seven of which flow to the middle basin of the Chicamocha river (Sogamoso river basin), 21 flow into the Casanare river (basin of the lower Meta river) and 20 into the Arauca river.