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4 trunk-or-treats near San Francisco Bay Area with 2026 dates confirmed on their official sites, across 4 towns. The earliest to open is 5th Annual Concord Police Department Trunk or Treat, on October 24. 3 list free admission.
Police department and police association trunk-or-treat in the station lot, with treats, goodie bags, food, games and prizes.
City Halloween celebration where kids trunk-or-treat through carnival games and info booths, plus a Monster Mash dance party, pumpkin patch and face painters.
Downtown trunk-or-treat along decorated car trunks, plus in-store trick-or-treating at local businesses and kids' crafts and games at the Main Street plaza.
Free parks-district trunk-or-treat with live music, games, performances, crafts, scavenger hunts, photo spots and a not-scary, underwater-themed "Unhaunted House".
5th Annual Concord Police Department Trunk or Treat, City HALL-o-Ween, Downtown Martinez Halloween Spooktacular and Hayward Trunk or Treat. Each has its 2026 dates, hours and prices on its own page.
The earliest in this guide is 5th Annual Concord Police Department Trunk or Treat on October 24, 2026.
Yes: 5th Annual Concord Police Department Trunk or Treat, Downtown Martinez Halloween Spooktacular and Hayward Trunk or Treat list free admission on the official site.
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