Located near the United States Marine Corps Base Camp Pendleton and the decommissioned San Onofre Nuclear Generation System plant, San Onofre State Beach-Surfing Beach is situated in San Diego County. The beach has three alternate names - Surf Beach, Old Man’s, and San O. The beach is situated within San Onofre State Beach, a state park spread over 3,000 acres. San Onofre State Beach-Surfing Beach has light brown sand, rocky reefs, and water with mild waves.