To attend the 1st event of the AMA Supercross in Anaheim 1 (2 or 3), you are certainly wondering about the health pass or wearing a mask. No need to worry, neither is mandatory. To begin with, the health pass does not exist in the United States in any form (paper or QR code). So no one is going to ask you if you have been vaccinated. It is also not necessary to wear the mask once in the stands since the stadium is open to the sky. It does not “fit” within California’s restrictions on events held “indoors.”
If you’re vaccinated, of course you can attend. If you’re not vaccinated, you can still attend and DO NOT need to show a negative test result. So basically speaking, just show up and bring your ticket.