Nightfall is the largest Haunted Theme Park in the southwest! | Nightfall at Old Tucson
September - October 31. Nightfall (at Old Tucson). This is a standard round here for a scary good time and runs Thursdays thru Sundays up to and including October 31. This isn't just simply a haunted house experience but a whole town experience! It really must be quite something and I'm sure a frightfully good time for as many years as it has been going on!