Come Join Us Oct 28 from 12-3 aAt One Loudoun’s Halloween Bark Bash (20626 Easthampton Plaza, Ashburn! Many of our available dogs and pups will be attending. The Halloween Bark Bash is an outdoor, Halloween-themed festival, bringing together local pet-focused businesses, animal rescue groups, and pet owners for an exciting day of trick or treating, adoptable dogs, music, costumes, and animals galore.