Mon. August 19th: Water Playdate: Contra Loma Regional Park: 11 am till 2 pm; Bring your lunch and enjoy the fun in the sun with us! Summer is here! Meet other families and let your little ones enjoy fellow company with a splish and a splash! Bring your lunch, picnic with us as the kids enjoy the water lagoon and sun! Don’t forget your picnic blanket and sun block! This regional park has a beach atmosphere has a whole water area baby and toddler friendly with lifeguards. Location: 1200 Frederickson Lane, Antioch.