The theme of this year's haunted ship tours is "Zombie Outbreak." The Irvin is located at 301 Harbor Drive in Duluth.
From the Haunted Ship website:
"Starting in the engine room you will travel through the ship until you land in your final destination which is below the freezing waters of Lake Superior in the maze of terror. If you thought the rest of the ship was terrifying, just wait until you step down into the maze. While down in the pitch dark 'dungeon' of the ship, not knowing where you’re going is the least of your worries. Watch your back; you never know who’ll be hovering over your shoulder."