The Sierra de Luquillo is a steep-sided, high-precipitation, and deeply-forested subrange of the Cordillera Central mountain range in the main island of Puerto Rico. Separated from the southeastern Sierra de Cayey subrange by the Caguas Valley, it is concentrated from west to east in the municipalities of Rio Grande, Luquillo, and Naguabo in the northeastern region of the island. The summit of the mountain range is El Toro at 3,526 ft., and its most recognizable peak is El Yunque at 3,461 ft.. As the location of El Yunque National Forest, the Sierra de Luquillo is a popular destination among domestic and foreign tourists.