Six Flags St Louis Fright Fest 2019. The freaks will enter the park for the first freaks unleashed. Fright fest 2019 was the 28th annual fright fest at six flags great adventure.

Fright fest 2019 is the 21st annual fright fest at six flags america. It will operate on select nights, mainly fridays, saturdays and sundays, from september 13 through.