Lares, Puerto Rico
Guajataca River has a length of approximately 25.5 miles (41 kilometers) with its origin in the Buenos Aires barrio of 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, Quebradillas, and Isabela forming Guajataca Lake on its path.