By City News Service Major COVID-19 Vaccination Site Situated At Six Flags Parking Lot Near LA VALENCIA (CNS) - With Six Flags Magic Mountain back in business, the large-scale COVID-19 vaccination site operated by the county in the theme park's parking lot will close next week and be replaced by a pair of smaller locations. The Magic Mountain vaccine site will close at the end of the day Sunday. On Monday, vaccination sites run by the county will open at College of the Canyons and the Palmdale Oasis Park Recreation Center, providing options for residents in the Santa Clarita and Antelope Valley areas.