Hi There!
How fun!!! Peanut loves road trips, even if we are going down the street to grab some food!! The HB dog beach is really nice. In that area there are tons of great walking paths, plus you are at the beach so it is awesome. I have found this link, it shows the top 10 dog parks in Calif. You can also search by city- it will pull up all the parks in that city!!
Home Page Top 10 Dog Parks in California