I don't remember the exact date range, but it's only 2-4 weeks roughly within the month of October. I can't imagine it in the winter either. We went on the last night a couple years ago and there were probably 30-40 people in front of us at least, not including the ones in the haunt; since you're exposed to the elements and don't even have any wind protection, it can get pretty chilly
They are only open during Halloween season.
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