The Arenas River () is a tributary of the Añasco River, located in Las Marías, Puerto Rico. The Arenas River has its source in barrio Maravilla Sur of Las Marías, flowing northwardly and passing Las Marías Pueblo before reaching its mouth at the Añasco River at the border of Alto Sano and Maravilla Norte barrios.Municipio de Las Marías. (2021, October). Las Marías Plan Final 2010-22 (Approved). Retrieved from https://jp.pr.gov/wp-content/uploads/2021/10/Las-Marias-Plan-Final-201022-Approved.pdf

See also

List of rivers of Puerto Rico

References

External links USGS Hydrologic Unit Map – Caribbean Region (1974) Rios de Puerto Rico