Halloween Events in Douglas County 2026

The Fangtastic Festival at Festival Park in downtown Castle Rock (Fri Oct 30, 11 a.m.–2 p.m., free) was the big one, and Spooktacular happened earlier, on Oct 17. Parker's big family day was Saturday Oct 24: Trunk or Treat on Mainstreet behind Parker Station (sensory-friendly hour 1–2 p.m., general admission 2–5 p.m., free with a timed-entry ticket per child), Beastly Bash at Larkspur Community Park (11 a.m.–2 p.m., $5) and The Great Pumpkin: A Storybook Holiday at the Douglas County Libraries that evening. The free Last Stop — Halloween Night at the Highlands Ranch Mansion closed out the month on Oct 31, 6:30–9 p.m.

HRCA ran the Haunted Forest in the Backcountry Wilderness Area — a three-quarter-mile trail walk recommended for ages 10+, Fri Oct 23 (6:30–9:30 p.m.) and Sat Oct 24 (7–10 p.m.), $15 general / $25 fast pass, with Fright Lite (Oct 24, 5–7 p.m., $10, same trail without the scare actors) and a daytime Fall Fest (Oct 24, 1–4 p.m.) at Rocky Heights Middle School in Lone Tree; Sat Oct 24's Haunted Forest sold out, while Friday still had tickets. Stockton's Plum Creek Stables in Roxborough ran Haunted Hayrides Oct 23–24 ($16, 2 and under free) as an HRCA 4-H fundraiser, and a Castlewood Ranch family opened its free walk-through haunted house at 6156 Medford Ct in Castle Rock on Oct 24, 30 and 31 (7:30–10 p.m.). In downtown Castle Rock, the Castle Rock Museum's free Ghostly Stories & Tragic Tales walking tours ran nine dates across October, and the Highlands Ranch Mansion's Spirits with the Spirits evening tours ran Oct 7, 14 and 21 ($44.52).

Yes — the PACE Center in Parker screened The Rocky Horror Picture Show with a live shadow cast (Sat Oct 24, 8 p.m., $32), which sold out ahead of time. Costume parties filled out Halloween weekend: Takoda Tavern in Parker (Sat Oct 24, free), then on Halloween night itself (Sat Oct 31) Sinners & Saints and The Whiskey Lodge in Castle Rock, That Eighties Band at Wide Open Saloon in Sedalia (from $17.85) and The Band These Guys at the Stagecoach Saloon in Franktown, all free except Wide Open Saloon. The Highlands Ranch Senior Center's Halloween Dance happened Thu Oct 29 ($19 members / $22 non-members).

Halloween fell on a Saturday in 2026, and neighborhood trick-or-treating was not centrally scheduled, so most families went out the evening of Oct 31. Saturday Oct 24 was the big organized day: the Dads of Castle Rock Trunk or Treat at Douglas County High School (5–8 p.m., free), Trunk or Treat on Mainstreet in Parker (free, timed-entry tickets for kids), Trick-or-Treat Street at the Castle Pines Fall Festival (10 a.m.–2 p.m., free), Boo Bash at the Outlets at Castle Rock (11 a.m.–2 p.m., free), Beastly Bash at Larkspur Community Park (11 a.m.–2 p.m., $5) and a free family trunk-or-treat at Kiddie Academy of Parker. Sterling Ranch held its Trunk or Treat at the Overlook Clubhouse on Fri Oct 30 (4:30–6:30 p.m.), and the Last Stop at the Highlands Ranch Mansion (Oct 31, 6:30–9 p.m., free) included a trick-or-treat stop.

Two official ones ran for 2026, plus Nextdoor's Treat Map of who was handing out candy. The Town of Parker's Halloween Home Decoration Map (ParkerCO.gov/HalloweenMap) took pins and photos from the 80134 and 80138 ZIP codes through Oct 31 and replaced the old judged contest, and the Highlands Ranch Community Association's Halloween House Decorating Map went up Oct 8 and added homes submitted through HRCA's form through Oct 30. As of Oct 4, Castle Rock, Castle Pines, Lone Tree and Larkspur had not posted a town decoration map.