Six Flags Great America Fright Fest

Fright Fest (also known as Festival Del Terror at Six Flags México) is a Halloween-oriented haunt event held annually at Six Flags theme parks in the United States, Canada, and Mexico. It mainly features haunted attractions, themed areas named Scare Zones, and live entertainment.
It opened as Fright Nights at Six Flags AstroWorld in 1986. In 2020, Fright Fest was reimagined to Hallowfest, due to the COVID-19 pandemic.