 There are nine rivers that flow south (Río Indalecia, Río Guayo, Río Inabón, Río Blanco, Río Anón and Río Prieto), and three that flow north (Río Saliente, Río Toro Negro, and Río Matrullas) from the forest.The Matrullas and Guineo reservoirs are also part of the forest.Río Toro Negro - after which the forest is named - separates the municipalities of Ciales and Orocovis; it also forms Lago El Guineo.