The Arenas River () is a tributary of the Guayanés River of Yabucoa, Puerto Rico. The river has its source in the northern slope of the Sierra Pandura in Guayabota barrio, close to the municipal border with Maunabo, and flows northward into the Guayanés also in Guayabota barrio.U.S. Geological Survey. (n.d.). Atlas of ground-water resources in Puerto Rico and the U.S. Virgin Islands. Retrieved from https://www.recursosaguapuertorico.com/GW_Atlas_of_PR_USGS.pdf
See also
List of rivers in Puerto Rico
References
External links USGS Hydrologic Unit Map – Caribbean Region (1974) Rios de Puerto Rico