San Diego-La Jolla Underwater Park

The San Diego-La Jolla Underwater Park is the historical name for a marine reserve that includes the San Diego-Scripps Coastal Marine Conservation Area (SMCA) and Matlahuayl State Marine Reserve (SMR), adjoining marine protected areas that extend offshore from La Jolla in San Diego County on California's south coast.

The underwater park originally spanned 6,000 acres (24 km2) of ocean bottom and tidelands, including La Jolla Cove. With four distinct habitats (rocky reef, kelp bed, sand flats, and submarine canyon), the area remains a popular destination for snorkelers and scuba divers.