🎃 Ten nights of frights this Halloween season!Sinister Sidney will be open Fridays and Saturdays this October (including Halloween!) from 7:30 – 10:00pm, weather permitting.We are an ages 12+ outdoor haunted attraction so dress appropriately for the weather.Tickets are $20 at the gate. 🎃.#sinistersidney #getsinistered #hauntseason2026 #hauntedhouse #iowahaunters #midwesthaunters #southwestiowa #Halloween

Sinister Sidney proudly hosts the 1st annual Operation Krampus—a chillingly cheerful effort to support the Fremont County Deputy Association’s Operation Santa. Every toy and cash donation from this event goes directly to the Association once the snow settles. 🎁 Bring a new, unwrapped toy and be entered for a chance to win two 2026 Sinister […]

Sadly another season has ended, the door is shut, the screams gone silent, and we say thank you to every patron and actor that made this season one of many memorable ones!! Without any of you, we couldn’t pull this off every year!!! However, our door may be shut till next season but this definitely […]

Final Night for 2023!!! We Are Open! Doors open at 7:30, Ticket booth closes at 10:00. Don’t forget to bring your non-perishables for a discount. No one under 12 allowed.