Pumpkin Nights Returns to Denver with 3,000 Hand-Carved Pumpkins Marissa KozmaOctober 1, 2019 It's official. Pumpkin Nights is returning to Adams County Fairgrounds in Brighton, Colorado for the 2019 Halloween season. Pumpkin Nights, an outdoor “interact... 'Burbs303 MagazineArtFeaturedLifestyleNeighborhoodsRecommended EventsSpecial Events2 min read