A third community within Los Serranos is the Greening-run 'retirement' mobile home park area which surrounds Lake Los Serranos, dam number 808. History Los Serranos, like the rest of Chino Hills, is primarily a residential community. Its original housing supported the staff and guests at The Los Serranos Golf and Country Club prior to the 1950s. Very few businesses have persisted in the area. There is the decades-old Descanso Market on Descanso Street which is the sole surviving business in Upper Los Serranos, which is the area's only Post Office center. One block away there was a fast food hamburger joint that closed down in the 60s/70s and is now the site of two houses. Next to the market is the local voting location. There are two churches in Upper Los Serranos; one focusing on local Asian population and one, the former American Legion post, predominantly appeals to the local Hispanics living in the area. In Lower Los Serranos there is one church. Lower Los Serranos also has one liquor store referred to as The Country Store; this store has also served the local residents for decades. It once had an exit from the Chino Valley (71) Freeway, making it easy for snacks and gasoline pit stops from a Chevron that once existed across the store. This Country Store also provided bait for the local fishermen of Prado Park Lake. The Los Serranos Golf and Country Club is the predominant business in Lower Los Serranos which still provides some jobs to local residents. Transportation Soquel Canyon Pkwy. Chino Valley Fwy. (SR 71) Chino Hills Pkwy. Los Serranos Blvd Yorba Ave/Los Serranos Country Club Drive/Butterfield Ranch Rd (a single highway, although under three different names) Education There are 2 schools located within Los Serranos—the Alternative Education Center and Chaparral Elementary School. The Alternative Education Center occupies the site of the former Los Serranos Elementary School, which closed following the 2008-2009 academic year. Located on the west end of Los Serranos at 15650 Pipeline Avenue, this site is "technically" located in the Chino Hills community of Glenmeade but as it faces the Los Serranos area and typically serves students from Los Serranos, it has locally been considered part of Los Serranos. The Alternative Education Center reopened in fall 2010 with a variety of programs, including a virtual high-school with online programs, independent studies, Chino Valley Learning Academy, Workforce Initiative Program and a