(Olympia, WA) -- Starting Monday, residents of Washington state will have to wear masks at all outdoor events as well as indoor public spaces, regardless of their vaccination status.  The new mask mandate covers events that draw 500 or more people throughout the state.  Governor Jay Inslee announced the new mandate yesterday in addition to a new requirement that all state, healthcare, K-through-12 and higher education employees be fully vaccinated by October 18th.