[1] It mainly features haunted attractions, themed areas named Scare Zones, and live entertainment.

Six Flags Over Mid-America was the third park to introduce Fright Nights in 1988 with Freddy Krueger from A Nightmare on Elm Street as the event's "entertainment chairman".

Since then, Six Flags has licensed other intellectual properties for mazes and scare zones, including the Saw films[7] and DC Comics's Suicide Squad.

To comply with the new health and safety protocols implemented by Six Flags due to the COVID-19 pandemic during 2020, the company announced that their Halloween event would be rebranded to Hallowfest.

This enhanced version of their annual Halloween event featured haunted attractions inspired by well-known horror franchises, namely Saw, Stranger Things, Army of the Dead, The Conjuring Universe, Trick ‘r Treat, Texas Chainsaw Massacre, and DCeased.

[19] Six Flags parks are heavily decorated for Fright Fest, and mainly feature haunted attractions at an extra charge, as well as live entertainment and scare zones.

[2] Fright Fest at Six Flags Magic Mountain has won USA Today's Reader's Choice Award for Best Theme Park Halloween Event twice, in 2016 and 2017.