Boos on B Street & Trick or Treating

Image of family in pirate costumes.

We're ready for a BOO-tiful day!

Join us on Saturday, October 28 from 2:00-5:00pm in Downtown San Mateo on the Pedestrian Mall (B Street between 1st and 2nd Avenue) for carnival games, pumpkin decorating, and live DJ music!


Stop by the Downtown San Mateo booth FIRST to get a map and a trick-or-treat bag! See which Downtown San Mateo businesses that will be participating in this event by visiting the Downtown San Mateo Association webpage.

Wear a costume and look FANG-tastic!

Grab lunch first and head on over, or enjoy the event then grab dinner! Costumes are welcomed and highly encouraged! This event is run by the City of San Mateo Parks and Recreation Department and the Downtown San Mateo Association and will be SPOOK-tacular!

Photo of families trick-or-treating downtown.
Photo of pumpkin being drawn on in preparation to be carved.

Pumpkin Carving & Decorating Contest

Bring a carved or decorated pumpkin to win in one of the following categories:

  • Scariest 
  • Funniest 
  • Most creative 
  • Best carved  
  • Best decorated 
  • Crowd Favorite

Read the Pumpkin Carving & Decorating Contest Rules for more information!

Unveiling a masterpiece!

Join us at the start of the event at 2:00pm for the unveiling of a unique piece of art that was created to celebrate the San Mateo’s commitment to racial equity. To learn more about the mural, please see the Racial Equity Art Project webpage.

Image of 2023 Boos on B Street Poster - English
Image of 2023 Boos on B Street Poster - Español