| For other uses, see Fright Fest 2021. |
Fright Fest 2021 was the 33rd Fright Fest event at Six Flags St. Louis, and the first Fright Fest event since Fright Fest 2020 was cancelled due to the COVID-19 pandemic and replaced with Hallowfest. It operated on select dates from September 24 through October 31, 2021. Like previous Fright Fest events and Hallowfest, Fright Fest 2021 was once again sponsored by Snickers.
Attractions[]
Haunted attractions[]
Scare zones[]
- Blood Bank Lounge
- Gnawlin's Hollow
- Rottingham & Bones Graveyard
- Sinister Clowns
- Spider Alley
- Sycophants
- Zombieville