The Halloween party season in the Valley got off to a wild start on Saturday, October 14, at Rawhide in Chandler during BOO! Arizona 2017. Countless electronic dance music fans donned costumes and got crazy at the one-night EDM festival, which featured sets by such DJ superstars as Zomboy, 12th Planet, Bro Safari, and Laidback Luke. Photos by Benjamin Leatherman.