Butterfly Pavilion in Westminster runs Crawl-O-Ween Trick-or-Treating on Saturday, Oct. 24, Sunday, Oct. 25, and Saturday, Oct. 31, 2026, from 9 a.m. to 5 p.m. Costumed children trick-or-treat at candy and toy stations set up throughout the invertebrate zoo, with the arachnid, butterfly and aquatic exhibits open along the way. The Pavilion bills it as a safe, indoor, stress-free way to do Halloween, and says children of all ages are invited, from toddlers to teenagers.
Costumes are welcome and encouraged; the Pavilion asks families to leave costume weapons and full-face masks at home. The event page does not list a separate event price and points to the hours and admission page, where general admission is $19.45 for ages 13 to 64, $14.45 for ages 2 to 12, $17.45 for 65 and over, free under 2 and for members, and $5 for SNAP and EBT cardholders. Admission is sold in hourly entry windows, and the Pavilion says to register online to secure a spot; members get discounted event pricing.
Know before you go
- Where: Butterfly Pavilion, 6252 W. 104th Ave., Westminster
- When: Saturday, Oct. 24, Sunday, Oct. 25, and Saturday, Oct. 31, 2026, 9 a.m. to 5 p.m.; last admission 4:15 p.m.
- Cost: General admission, timed entry: $19.45 adults, $14.45 ages 2-12, $17.45 seniors, under 2 and members free, $5 with SNAP or EBT
- Who: Children of all ages in costume, with their adults
- Tickets: event page (Get Tickets link)
- Also that week: a Sensory Friendly Afternoon on Wednesday, Oct. 21, 3 to 5 p.m., with subdued sound and lighting and a quiet room
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