California Halloween Events

Hayward Trunk or Treat - Promise Fest

October 25, 2025, 11 a.m.-3 p.m. 

Heritage Plaza
888 C Street
Hayward, CA
Free, hayward-ca.gov

Live music, car show, trunk or treat - costumes encouraged, games & family friendly activities, cultural arts performances, and four hours of fun!

Produced by Hayward Library and co-sponsored by Hayward Promise Neighborhoods, the free annual event invites the public downtown to Heritage Plaza to celebrate Halloween with Trunk or Treating Car Show featuring decked out car trunks in spooky, friendly, fun themes. It's sure to entertain.

 

Hayward Unhaunted House & Carnival

October 17-18, 2025

Oct.17, 6-8:30 p.m.
Oct.18, 4-8 p.m.

Sulphur Creek Nature Center
1801 D  Street
Hayward, CA
$8, under age 3 years free, haywardrec.org

Step inside if you dare! Enjoy an evening carnival with Halloween crafts, storytelling, fun games, and tasty treats. Bring the family! Explore the land of creepy crawlies and amazing arthropods at this year's Unhaunted House and Carnival event.

Step back in time for a dino-mite Halloween celebration like no other! Dino-ween brings the prehistoric past to life with a spooky twist. Dress as your favorite dinosaur (or daring explorer) and enjoy a night of thrilling activities, creepy crafts, and spine-chilling surprises.  Get ready to ROAR into Halloween.

Age under 3 years free. Under 12 years must be accompanied by a paying adult. Pass covers entry into Unhaunted House only, carnival tickets are sold separately at the event.

Hayward Floating Pumpkin Patch and Public Swim

October 18, 2025, 1:30-3:30 p.m. 

Hayward Plunge
24176 Mission Blvd.
Hayward, CA
$10 All Ages, haywardrec.org

Come and enjoy a floating Pumpkin Patch at the Hayward Plunge. There will be a decorating station for creating your own unique pumpkin. Prizes will be given for the top decorated pumpkins. Each person registered will receive a pumpkin and a goodie bag. 

Howl0ween

October 25, 2025, 10-11:30 a.m.
$20, haywardrec.org

 Join the first ever Howl-O-Ween celebration! Our paw-some celebration includes a costume contest, pet parade, and photo opportunity! Dogs must be up to date on required vaccinations and leashed (not retractable leashes) at all times. Stop by the check-in booth to receive a themed toy and treat.

Events are not guaranteed. It is your responsibility to confirm before going.


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