See Current COVID Protocols × Six Flags Discovery Kingdom Change Park Covid-19 Update Groups Enter Promo National Pass Holder Login Things to Do Plan Visit Help Tickets & Passes Cart [0] November 26 - January 2 *Select Dates See Details COVID-19 Protocol Update – Masks Required Indoors Per the City of Vallejo mandate, masks are required indoors for ALL guests over the age of 3 at Six Flags Discovery Kingdom, regardless of vaccination status. While guests and team members are not required to wear masks outdoors, consistent with CDC guidance, we will continue to recommend masks at all times, including while outdoors, for unvaccinated guests and team members.