Mayhem Haunted House

08/29/2026

☠️ THE MAYHEM IS COMING… AND THIS YEAR, THE DARKNESS IS HUNGRY. ☠️
You hear the screams before you ever reach the door.
You tell yourself they’re part of the show.
Keep telling yourself that. 😈
This October, MAYHEM HAUNTED HOUSE opens its doors for another season of darkness, terror, and things that should have stayed buried.
🩸 OCTOBER 9 & 10 • 16 & 17 • 23 & 24
⏰ 7 PM – 12 AM
🎟️ $20 PER VICTIM… we mean, ticket.
📍 13011 120th Ave • Ottumwa, Iowa
Come with your friends.
Hold onto them tightly.
Not everyone handles MAYHEM the same way.
💀 THE DOORS OPEN SOON.
🩸 THE SCREAMS ARE WAITING.
😈 ARE YOU?
Tag someone brave enough to enter with you… and SHARE if you think they'll make it out.

08/11/2026

Thank you for all the supporters of Mayhem for 2025!! Been busy putting together yet another great season for 2026.

Looking for the best Iowa Halloween attractions? Then you'll want to check out our Haunted Hall of Fame! IowaHauntedHouses.com's Attraction of the Year winners were voted on by thrill seekers like YOU - so you know they're a ton of fun, and packed with big scares!

07/26/2026

Sign up today at the following link https://forms.gle/E4wVZmRRkZG2NJcd6

07/10/2026

Your support of Mayhem Haunted House does more than fuel the scares — it fuels the future. Because of this community, Wapello County 4‑H and FFA youth have a safe place to showcase their hard work, from creative projects to award‑winning livestock.Come explore the incredible displays at the Wapello County 4‑H Expo, July 11–18.
Celebrate the kids who make this county proud.

07/04/2026

🎆🇺🇸 THIS JULY 4TH… THE COUNTDOWN BEGINS. 🇺🇸🎆IN A WORLD CELEBRATING 250 YEARS OF FREEDOM…
…one place in Ottumwa is preparing to take it away.🔥 BOOM. Fireworks crack the sky.
🔥 BOOM. The ground shakes.
🔥 BOOM. Something inside Mayhem answers back.LESS THAN 100 DAYS until the doors open.
Less than 100 days until the lights go out.
Less than 100 days until you step into the dark…
…and realize you’re not alone.🎙️ “This Semiquincentennial… the real explosion happens in the haunt.”Shadows crawl.
Walls breathe.
Creatures wake.
And every firework tonight is just a warning shot.This fall… Mayhem returns.
And it’s not coming quietly.🎆 HAPPY SEMIQUINCENTENNIAL, AMERICA.
🩸 SEE YOU IN THE DARK, OTTUMWA.

04/23/2026

The clock is ticking.
170days and counting!!
The monsters are restless.
And when Mayhem Haunted House opens again… nothing inside will show mercy.
Prepare to run.

03/27/2026

Transworld's Haa show 2026
Wandering the halls of Transworld 2026 and let’s just say…
I’ve already seen things that will haunt your dreams in the best way.

Mayhem is leveling up this year.
You’ve been warned.

03/25/2026

"We’ve been seeing some new faces around here lately! 👋
​We’d love to know: How did you first discover us?
​🔍 A Google search?
​📱 A friend’s recommendation?
​✨ Stumbled across one of our posts?
​Drop a comment below and let us know! We’re always looking for ways to reach more awesome people like you."

03/17/2026

The "Lucky You" Tease
​Some pots of gold are better left buried. ⚰️🌈
Think you’ve got the luck of the Irish on your side? You’re going to need it. This St. Patrick’s Day, we’re trading shamrocks for shadows and rainbows for rot.
​The spirits at Mayhem Haunted House don’t care if you’re wearing green—they only care if you’re fast enough to get away. 🏃💨
​Tag a friend who’s a total "scaredy-cat" below. If they don’t reply in 17 minutes, they owe you a drink (and a trip to Mayhem this fall)!
​

01/01/2026

🎃 Only about 275 days until the screams return to Mayhem Haunted House.
The shadows are already shifting… the crew is already plotting… and 2026 is shaping up to be our biggest, wildest season yet.

Ottumwa has no idea what’s coming.