Rancho Peñasquitos is a suburban community located in northeastern San Diego, California. It is frequently referred to by the abbreviation "PQ" and derives its name from Rancho Santa Maria de Los Peñasquitos, which was the first Mexican land grant in San Diego County.
The community abuts the Los Peñasquitos Canyon Preserve. This open space preserve provides local residents and visitors with various outdoor recreational opportunities, including hiking, biking, and equestrian trails.