OC Dog Works.com
Places to go, things to do and other good stuff for dogs
Orange County, California
On Pacific Coast Highway between 21st St. and Seapoint St.; 100 Goldenwest St., 92648. Open 5 a.m. to 8 p.m. daily. Dogs may be off-leash in the water and on the wet sand -- three quarters of a mile long.
At Central Park; Edwards at Inlet; (714)536-5672; 1.5 acres. Separate small dog area for pooches under 25 lbs. and for older or handicapped dogs. Dawn to dusk.
6405 Oak Canyon Road. 6:30 a.m. to 9 p.m. every day but Wednesday. Three acres with a separate area for small or shy dogs. (949) 724-7740.
On Laguna Canyon Road—east side of road. Dusk to Dawn daily EXCEPT Wednesdays. Closed when raining.
Fenced, water, landscaped. Located on a little over an acre at Golden Lantern near Firestation #49. Open from dawn to dusk. 
Basic Dog Park Etiquette
Other Places to take you dog
your boat (or your friend's boat)
Fashion Island - Newport Beach (dog friendly)
Irvine Spectrum (dog friendly)
Balboa Island - walk around the island (but not on the beach)
Dana Point Harbor
your local park - check regulations, many allow dogs as long as they are leashed