Is a proof of residence required to enter six flags? I'm visiting California this week.

Yes six flags asks for IDs and you have to be living in state and if you are out of state you cannot enter or come

Yes CA residents only.

U should be fine i went last week and they did not check ids

It's definitely possible to be turned away for being out of state but they weren't checking any ID's when we visited yesterday

The guide said that if u are from out of state u can't attend