The festival is inside the park's attractions area, meaning you'll need a ticket to visit, on top of general park admission. (You can get an All-Attractions pass for about $25 if you come wearing a costume.)
The family-friendly fest begins Saturday, Sept. 21 and runs every Friday, Saturday and Sunday until Nov. 3.
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The county had two cases of West Nile virus last year, with one of them being fatal.