The Rio Guajataca is a river on the island of Puerto Rico. It is located in the northwest coast of the island. It flows from the south and drains into the Atlantic Ocean.
Guajataca River has a length of approximately 25.5 miles (41 kilometers) with its origin in the municipality of Lares, Puerto Rico at an altitude of approximately 1,600 feet (488 meters) above sea level. It crosses the municipalities of Lares, San Sebastián, and Isabela forming Guajataca Lake on its path.
The river also gives name to one of the principal lodgings in the area, Parador Guajataca. Guajataca, sometimes spelled Guajataka, is an area in Puerto Rico in the municipality of San Sebastián, Puerto Rico. The name was given by the original inhabitants prior to the arrival of Cristobal Colon. The river, Río Guajataca, also carries the name and the subsequent man-made lake, Lago Guajataca, built by the United States Army Corps of Engineers and owned by the Puerto Rico Electrical Authority was named for the area. Many schools, businesses, and organizations, including a parador, Guajataka Scout Reservation, and kayak excursion company are named for the area as well.