By law, Los Angeles county doesn't allow dogs on even one square inch of beach, ever. There are certain secret spots that we would take the dogs, but always with the threat of being ticketed. It's ridiculous. On our first visit to Puerto Rico we watched a surfer head out into the water and his 3 dogs follow him in. They paddled out as far as they could then came back and played on the shore until he was done. They were the happiest dogs we had ever seen and reminded me of Sancho when I used to drive him down to the Huntington dog beach.
I've been taking Sancho to the beach since he was a puppy. He loves the water and is fearless when chasing a ball or a stick into the waves. He's almost 10 years old now and his trips to the beach had become less frequent due to athritis in his front legs, he just can't walk very far. But in Rincon, we can put him in the car and go to the beach for a quick trip without having to make a full day of it. He spends about 15 minutes swimming and gets great exercise without putting too much strain on his old legs. It's made him a much more active dog and I'm assuming much happier.
Our other dog is Pud, a little over a year old, he has taken much longer to get used to the water. We couldn't even get him in the car to go to the beach, but he has started to follow Sancho further out every day, he's overcoming his fear of the water and even gets excited now when we jingle the car keys signaling a trip to the beach. Our neighbor, Angelo, has 3 dogs that he takes down to the beach every morning to run and hike. I don't see a big business for dogwalkers in Rincon because people have the time to do it themselves and a beautiful place for the dogs to get exercised.