Off-Leash Parks - Parks and beaches in Southern California
http://www.hautedogs.org/offleash.html

Off-leash Dog Beaches:

Runyon Canyon Dog Park (Hollywood)
Alice Frost Kennedy Dog Park (Pasadena)
Diamond Bar Dog Park
Long Beach Belmont Shore's The Dog Zone
Huntington Beach Dog Beach
San Dimas Dog Park
Santa Barbara Arroyo Burro Beach
San Diego Del Mar Dog Beach
San Diego Fiesta Island
San Diego Ocean Beach Dog Beach
San Diego Coronado Dog Beach

Castaic Canine Camp (狗營地) https://www.castaiccaninecamp.com/