State-run COVID-19 vaccine site at Gila River Arena closing Last day for COVID-19 vaccines at Gila River Arena Monday is the last day for the state-run COVID-19 vaccination site to be open at Gila River Arena in Glendale. GLENDALE, Ariz. - The last state-run COVID-19 vaccination site at Gila River Arena is closing on Monday. Chris Burbach went to the arena to get his two oldest sons vaccinated. "I found these sites to be a lot easier because you know where you are going to get your appointments to get in and out." June 28 was the last day for people to get a shot in Glendale because Dr. Cara Christ says the demand isn't there anymore.