Thornton Halloween Events & Fall Outings 2026

8 listed options in Thornton, with dates, costs, age guidance and direct organizer links. Choose a candy outing, costume event or seasonal plan that fits your group.

Coverage is curated, not exhaustive. Some listed dates may have passed; check each date before planning. Nearby towns are listed in their own city guides. Age restrictions and uncertain prices stay visible.

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Trick-or-treating

Thornton Trunk or Treat

2026-10-17 · 6–9 PM · Mountain Time

Candy-filled trunks, Boo Bayou and optional Garden of Ghouls.

Location: 11000 Colorado Blvd, Thornton, CO 80233

Cost: $5 per person or $15 per family of four
Age guidance: Family-friendly; numeric age limits not published

Garden of Ghouls is not designed for children under 10; intense effects and strobes. Entry lines may close before 9 PM.

Organizer details for Thornton Trunk or Treat

Source checked 2026-10-14

Thornton Police Haunted Hallways

2026-10-21 · 6–8 PM · Mountain Time

Costumes and candy at both police districts.

Location: 9551 Civic Center Dr, Thornton, CO

Cost: Free admission
Age guidance: Family-friendly; numeric age limits not published

This card represents one event at two locations: District 1 at this address and District 2 at 13150 Quebec St. Optional haunted house at District 1. Pin/directions use District 1.

Organizer details for Thornton Police Haunted Hallways

Source checked 2026-10-14

Monster Mash Family Bash — Main Event Thornton

2026-10-30 · 6–9 p.m. · Mountain Time

A ticketed Halloween package with one hour of bowling, a laser-tag game, $10 arcade card, pizza and soft drink, crafts, DJ entertainment and trick-or-treat stations.

Location: 580 E. 144th Avenue, Thornton, CO 80023

Cost: $28.33 per person displayed, including tax and gratuity
Age guidance: All ages; under-18s must be accompanied by an adult aged 25+

Costume contest 8–9 p.m. The primary ticket page displays a selectable October30 6p.m. GeneralAdmission ticket; availability can change. Exact Thornton venue independently confirmed, not copied from another branch.

Organizer details for Monster Mash Family Bash — Main Event Thornton

Source checked 2026-10-15

Trunk or Treat at TLE Thornton

2026-10-30 · 4:30–6:30 PM · Mountain Time

A community candy outing with games and the school mascot.

Location: The Learning Experience,11901 Holly Street, Thornton, CO 80233

Cost: Free; optional fundraiser goodies sold separately
Age guidance: All ages

Organizer details for Trunk or Treat at TLE Thornton · Tickets or registration

Source checked 2026-10-15

Pumpkin patches & corn mazes

Maize in the City

2026-10-15 · 2026-10-16 · 2026-10-17 · 2026-10-18 · 2026-10-22 · 2026-10-23 · 2026-10-24 · 2026-10-25 · 2026-10-26 · 2026-10-27 · 2026-10-28 · 2026-10-29 · 2026-10-30 · 2026-10-31 · Oct15,22,26–29 noon–6pm; Fridays10am–7pm; Saturdays/Sundays9am–7pm · Mountain Time

Corn maze / pumpkin patch / fall festival

Location: 10451 McKay Rd, Thornton, CO 80233

Cost: Free grounds entry; individual paid attractions. Schedule quotes $0–$20, FAQ $0–$22; exact attraction prices onsite. Pumpkins extra.
Age guidance: Organizer explicitly offers attractions for all ages

No online tickets: buy each attraction onsite, card payment; cash exchange at info booth. Lines close early: schedule says big maze1.5h before closing, FAQ2h; arrive at least2h before closing. Weather/field conditions apply. Live2026 calendar verified.

Organizer details for Maize in the City

Source checked 2026-10-13

Costume parties & contests

HALLOSPRINGS at the Haunted Castle

2026-10-24 · 7:00 PM–2:30 AM (ends October 25); doors 6:45 PM · Mountain Time

Halloween dance and costume party

Location: The Castle Event Center, 83 E 120th Ave, Thornton, CO 80233

Cost: $20 displayed; final ticket total may vary
Age guidance: 21+

Organizer page title currently starts 'Copy of'. Costume/DJ contest advertised; alcohol inclusion not stated. Separate event/date/organizer from Dark Harvest. No prize guarantee made.

Organizer details for HALLOSPRINGS at the Haunted Castle · Tickets or registration

Source checked 2026-10-12

Dark Harvest Masquerade Ball

2026-10-31 · 9:00 PM–2:00 AM (ends November 1) · Mountain Time

Masquerade ball

Location: The Castle Event Center, 83 E 120th Ave, Thornton, CO 80233

Cost: $10 plus fees; VIP $75 plus fees
Age guidance: 18+; alcohol age/ID rules not detailed on organizer page

Mask required, fine attire dress code. Base ticket does not promise drinks; VIP explicitly includes two complimentary drinks. Organizer ticket summary labels venue Northglenn, while detailed venue and official vendor page identify Thornton; street address matches. Source https://darknesscon.com/become-vendor confirms address.

Organizer details for Dark Harvest Masquerade Ball · Tickets or registration

Source checked 2026-10-12

Haunted houses & spooky experiences

Haunted Field of Screams

2026-10-15 · 2026-10-16 · 2026-10-17 · 2026-10-18 · 2026-10-22 · 2026-10-23 · 2026-10-24 · 2026-10-25 · 2026-10-29 · 2026-10-30 · 2026-10-31 · Timed evening entry; select the exact available slot at checkout · Mountain Time

Outdoor cornfield haunt with a themed ride and haunted areas.

Location: 10451 McKay Rd, Thornton, CO 80233

Cost: Live ticket page shows $34.99 general admission; price varies by date/time. Fees/final total at checkout.
Age guidance: Organizer does not recommend this attraction for children

Official site identifies the 2026 season; linked provider still has a 2025 title, but its available calendar dates are October 2026. Enter your timed queue within the 30-minute window. Recheck availability before traveling; tickets nonrefundable.

Organizer details for Haunted Field of Screams · Tickets or registration

Source checked 2026-10-14