Kati

Ok this isn't a dog park.
There isn't a fenced area here.
True there aren't dog beaches in Oceanside but my Rhodesian Ridgeback spent plenty of late afternoons running on the beach across the street legal or not.
This park has one of the raddest playgrounds for kids. They just renovated it and its full of fun play things.
And if your dog is like mine she will fall in love with the squirrels by the creek that are not shy of dogs a bit and will take food off their paws if they sit there long enough. I think most people are reviewing Oceanside instead of the park. I raised my dog in Oceanside and never fell short of schoolyards a d parks to run her in. Legal or not, if you clean up after your dog and have your dog under control, its a great place.

Lots of parking, water on tap, big fenced area, right next to a big kids skate park, grass, shade and seating.
Maybe not the most beautiful area (behind some hotels) but the park is a very nice place to take a break and let your dog run on some grass. No dogs to join us but my little guy ran around like there was and then sat in the water that pooled by the spigot so he was happy.