Due to their top ten principles, anyone is allowed to attend Burning Man. It is actually not a festival. Instead it is considered to be a community that is set up during this brief time at the end of the summer. It allows people to display their artistic skills to anyone who comes to Burning Man. It is expected that most people who do attend are relatively young adults because this would appease them, but older adults are always welcome.
So, instead of focusing on age, those who should attend would be those that would enjoy it. It is believed that those who are interested in art and displaying their artwork should attend since the whole concept of Burning Man is about artistic expression.