Agua Dulce is a census-designated place in Los Angeles County, California, United States. It lies at an elevation of 2,526 feet (770 m), northeast of Santa Clarita. The community had a population of 3,342 at the 2010 census and covers a geographic area of about 23 square miles (59 km2). Agua Dulce is on the Pacific Crest Trail. The ZIP code is 91390, and the area code is 661.

The Sierra Pelona, also known as the Sierra Pelona Ridge or the Sierra Pelona Mountains, is a mountain ridge in the Transverse Ranges in Southern California. Located in northwest Los Angeles County, the ridge is bordered on the north by the San Andreas fault and lies within and is surrounded by the Angeles National Forest.