The Blanco River () is a river of Naguabo, Puerto Rico. This river begins at the waterfalls of the junction of the Cubuy River, the Icacos River and the Prieto River in El Yunque National Forest at an approximate elevation of above sea level. It is approximately in length, from its origin until its discharge into the east coast of Puerto Rico in RÃÂo barrio in the municipality of Naguabo. It runs from north to southeast.
The upper portions of the Blanco River is famous for its waterfalls and plunge pools (charcos) such as El Hippie, a popular swimming site formed by La Canoa Falls. The entire river basin is also famous for its numerous indigenous petroglyph sites, such as the ones found in El Hippie and the RÃÂo Blanco Petroglyphs, found higher upstream within the protected territory of El Yunque National Forest.