HUMBOLDT COUNTY, Calif. — October 30, 2026. Eureka and Arcata offer several Saturday events that can be combined into one North Coast Halloween day. The city’s public zoo calendar and Humboldt County’s library calendar independently confirm daytime options; the Arcata Plaza party follows later.
Saturday, October 31: what is actually scheduled
Sequoia Park Zoo Boo at the Zoo
When: Saturday, Oct. 31, 11 a.m.–3 p.m.. Where: Sequoia Park Zoo, 3414 W Street, Eureka.
Pumpkin enrichment for animals, a Spooky Science Center and treat stations. Activities are included in regular zoo admission or membership. Source and last-minute checks.
Eureka Main Library Trick or Treat Book Giveaway
When: Saturday, Oct. 31, 11 a.m.–3:30 p.m.. Where: Eureka Main Library.
The county calendar lists free books for children and a seasonal craft, with costumes encouraged. Source and last-minute checks.
Arcata Halloween on the Plaza
When: Saturday, Oct. 31, 4–7 p.m.. Where: Arcata Plaza, 8th/9th and G/H streets, Arcata.
A free evening with trick-or-treating, community vendors, live music, costumes and face painting. Source and last-minute checks.
Plan your Halloween day
Children can enjoy a book giveaway or a zoo visit before the Arcata evening program. The zoo and library overlap, so choose based on admission and energy levels. Allow driving time between Eureka and Arcata, dress in warm layers, and expect possible rain.
Sunday, November 1, and other options
Eureka Main Street lists downtown and Old Town business trick-or-treating 2–4 p.m. on Saturday; participating shops post signs rather than every storefront distributing treats.
Verify before traveling
The date of Halloween is Saturday, October 31, 2026. A program held on Friday, October 30, should not be mistaken for a Saturday event. Organizers may change hours, fees or locations. Confirm the latest calendar and any required booking; some tourism and community calendars aggregate submitted listings rather than manage the event themselves. Keep children’s costumes visible, use marked crossings and plan for autumn darkness. For live state-road conditions use Caltrans QuickMap.
Find Humboldt County’s year-round reporting. Corrections and original source documents: california58com@gmail.com.
California58 Halloween weekend guide. Organizer and community-calendar sources linked per event; research checked October 30, 2026. No unsourced parade or unverified current-hours claim is presented as confirmed.
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