BOO! at the Zoo, Knoxville’s favorite Halloween tradition, kicks off three weekends of spooky fun! Get your tickets before they’re gone at booknoxville.com! A Halloween tradition for 36 years, this year’s BOO! at the Zoo will feature a Treat Trail with 21 treat stations, dramatic lighting, giant inflatables, and the Monster Mash dance party, special character nights, the Scary-Go-Round and the BOO! Choo Train! New this year are the Pumpkin Carriage zipline ride and the Oktoberfest Beer and Brats