Alameda skatepark has been around for many years. It is a big part of bmx history for nor cal. Built by skateboarders AND bmxers from Alameda, and the week it opened, I think around 2000? Bikes were banned! And they became strict to ban bikes, and handed out tickets regularly.
I myself have had a number of tickets, due to it being a local place to ride, and trails being plowed by city workers that don't understand bmx. The bmx riders in the bay area old, and new school would session there and deal with it.