This popular Castro Valley swimming spot is only a short drive north from Interstate 580 on Cull Canyon Road in Castro Valley. The swim complex is open during swim season with lifeguard service. The swim complex includes a bathhouse, vending machines, and the 1.5-acre swim lagoon. Inside the swim complex there are three additional reservable picnic areas. There are several reservable picnic areas at the park. For information, call 1-888-EBPARKS or 1-888-327-2757.