Frank G. Bonelli Regional Park is a man-made recreational area in San Dimas, California, United States, in Los Angeles County. It is near the Orange Freeway (State Route 57), the Foothill Freeway (Interstate 210) and the San Bernardino Freeway (Interstate 10). It is named after former LA County Supervisor Frank G. Bonelli. The park contains a 250-acre (1.0 km2) lake called Puddingstone Reservoir, which provides a place for fishing, swimming, sailing, wind surfing, boating, and jet skiing, along with a waterfall. The park is adjacent to one of the area's largest water parks, Raging Waters.