Bay Area KidFest in Downtown Concord for our 23rd annual Memorial Day Weekend festival. KidFest is one of the Bay Area's premier family events for over two decades including several entertainment stages, free activities, carnival rides, food booths and 125 exhibitors. Proceeds benefit United Mt. Diablo Athletic Foundation to save Mt. Diablo Unified School District high school sports. For 17th year donor for Food Bank of Contra Costa and Solano. Hours: 10 a.m. to 6 p.m. Saturday through Monday. less