On October 31, 2026, Humboldt County families can find a verified zoo celebration in Eureka, a costume party on the Arcata Plaza and a free book giveaway at the Eureka library. These are separate events, so compare times before deciding whether to attend more than one.

Updated October 11, 2026. Dates, prices and organizer details may change. Always confirm before visiting.

4 family Halloween and fall outings in Humboldt County

1. Boo at the Zoo!

Where: Sequoia Park Zoo, 3414 W Street, Eureka
Date: October 31, 2026
Time: 11 a.m.–3 p.m.

Family-friendly animal pumpkin enrichment, trick-or-treat stations and a Spooky Science Center. Activities are included with normal zoo admission or membership. Check organizer or local event listing.

2. Halloween on the Plaza

Where: Arcata Plaza, Arcata
Date: October 31, 2026
Time: 4–7 p.m.

Arcata Chamber confirms costumes, local food vendors, live entertainment and face painting. A bar serves adults; families can focus on the all-ages activities. Check organizer or local event listing.

3. Trick or Treat Book Giveaway

Where: Eureka Main Library
Date: October 31, 2026
Time: 11 a.m.–3:30 p.m.

Free book for children, seasonal craft and costumes encouraged. A nice lower-cost alternative to candy-only celebrations. Check organizer or local event listing.

4. Redwood family nature walk

Where: Sequoia Park, Eureka
Date: Choose a dry October daytime
Time: Park hours and access apply

An extra family outing among redwoods near the zoo; not a special Halloween event. Follow park rules and avoid forest trails after dark. Check organizer or local event listing.

Family itinerary and local tips

A practical October 31 plan is the library or zoo during the day, then the Arcata Plaza from 4 p.m. The zoo has an admission fee, while the library program is free. Keep an eye on North Coast rain, and dress children in warm layers.

Before you go

Check the latest event calendar, ticket rules and weather. Keep children visible near roads and parking lots, supervise interactions with animals, and respect age limits. Events labeled as general fall outings are not guaranteed Halloween costume parties.

Explore more: California Halloween 2026 county directory and OptionTrip for travel planning.

Sources

California58 editorial guide. OptionTrip is a related travel-planning service.

Explore Humboldt County beyond Halloween

Explore beyond Halloween: read our Humboldt County year-round travel guide for attractions, outdoor places and planning ideas.

For county-specific communities, public services and local knowledge, visit the Humboldt County reference profile. You can also browse all California58 travel guides. Halloween 2026 events are seasonal and may change; check each organizer’s current calendar before traveling.

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