The Nightmare Experiment is a Colorado haunted house that brings your worse childhood fears to life!

Beyond the scariest depths of your childhood fears, where creepy crawlies lurk in the shadows, a haunted house so frightening awaits you in Fort Collins, Colorado, at the Foothills Mall.

Be sure to checkout the location of our Halloween events and our hours of operations before you come!

The nightmare experiment is so scary you will cry out for mommy at every turn! Make this the best Halloween nightmare you will want to forget.

The Nightmare Experiment is a participant of the Battle of the Haunted Houses in Fort Collins, Colorado.

Attend The Battle of the Haunted Houses and vote for your favorite Halloween event – Destination Terror or The Nightmare Experiment.