Rancho Peñasquitos is a suburban community in northeastern San Diego, California. It is named after the first Mexican land grant in San Diego County, Rancho Santa Maria de Los Peñasquitos. The community abuts Los Peñasquitos Canyon Preserve, an open space preserve that offers hiking, biking, and equestrian trails. The community is commonly abbreviated "PQ." The population of Rancho Peñasquitos is approximately 60,000. it is located in ZIP Code 92129. The telephone area code is 858 or 619.