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Free Events and Things to do in Castro Valley, CA

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Citywide Clean-up & Community Fair 2026
Sat, Apr 25, 8:30 AM
Hayward · Weekes Park
Citywide Clean-up & Community Fair 2026
Sat, Apr 25, 8:30 AM
Hayward · Weekes Park
Almost full
Salt Marsh Walk
Sunday at 11:00 AM
Fremont · San Francisco Bay National Wildlife Refuge Visitor Center
Almost full
Salt Marsh Walk
Sunday at 11:00 AM
Fremont · San Francisco Bay National Wildlife Refuge Visitor Center
Almost full
Oakland Career Fair
Thu, May 28, 9:30 AM
Oakland · Oakland Downtown
Almost full
Oakland Career Fair
Thu, May 28, 9:30 AM
Oakland · Oakland Downtown
Community Easter Egg Hunt by The McLane Team
Sat, Mar 28, 11:00 AM
Walnut Creek · Rudgear Park
Community Easter Egg Hunt by The McLane Team
Sat, Mar 28, 11:00 AM
Walnut Creek · Rudgear Park
Going fast
Clothing Swap & Block Printing!
Tomorrow at 1:00 PM
Oakland · Junior Center Of Art & Science
Going fast
Clothing Swap & Block Printing!
Tomorrow at 1:00 PM
Oakland · Junior Center Of Art & Science
Bunny Hop Scavenger Hunt + Free Bunny Photos!
Sat, Apr 4, 10:00 AM
Pleasanton · Pleasanton Museum on Main
Bunny Hop Scavenger Hunt + Free Bunny Photos!
Sat, Apr 4, 10:00 AM
Pleasanton · Pleasanton Museum on Main
STEAM Fair - FREE Family Day at Junior Center
Sat, Apr 18, 11:00 AM
Oakland · Junior Center Of Art & Science
STEAM Fair - FREE Family Day at Junior Center
Sat, Apr 18, 11:00 AM
Oakland · Junior Center Of Art & Science
Sales end soon
Cyber Security Workshop
Tuesday at 3:30 PM
Castro Valley · Castro Valley Library
Sales end soon
Cyber Security Workshop
Tuesday at 3:30 PM
Castro Valley · Castro Valley Library
Almost full
WOEIP environmental justice salon
Wednesday at 5:00 PM
Oakland · Brix Factory Brewing
Almost full
WOEIP environmental justice salon
Wednesday at 5:00 PM
Oakland · Brix Factory Brewing
Almost full
11th Annual BayViro Symposium
Sat, Apr 11, 9:00 AM
Berkeley · Li Ka Shing Center
Almost full
11th Annual BayViro Symposium
Sat, Apr 11, 9:00 AM
Berkeley · Li Ka Shing Center
Almost full
Nadine Takvorian's ARMAVENI - Graphic Novel For Teens In-Store Event
Tomorrow at 6:30 PM
Berkeley · Mrs Dalloway's
Almost full
Nadine Takvorian's ARMAVENI - Graphic Novel For Teens In-Store Event
Tomorrow at 6:30 PM
Berkeley · Mrs Dalloway's
Sales end soon
Composting is a Hot Topic
Sunday at 10:00 AM
Fremont · LEAF Urban Farm
Sales end soon
Composting is a Hot Topic
Sunday at 10:00 AM
Fremont · LEAF Urban Farm
Sales end soon
Berkeley Water Day: Managing Water Under Climate Extremes
Tuesday at 9:00 AM
Berkeley · Banatao Auditorium
Sales end soon
Berkeley Water Day: Managing Water Under Climate Extremes
Tuesday at 9:00 AM
Berkeley · Banatao Auditorium
Almost full
San Francisco Chapter - Paint/Sculpt Out at Ardenwood Historic Farm
Sat, Apr 11, 10:00 AM
Fremont · Ardenwood Historic Farm
Almost full
San Francisco Chapter - Paint/Sculpt Out at Ardenwood Historic Farm
Sat, Apr 11, 10:00 AM
Fremont · Ardenwood Historic Farm
Sales end soon
What’s Beneath the Surface: The Secret to Healthier Plants - Dublin
Sunday at 10:00 AM
Dublin · SummerWinds Nursery
Sales end soon
What’s Beneath the Surface: The Secret to Healthier Plants - Dublin
Sunday at 10:00 AM
Dublin · SummerWinds Nursery
Sales end soon
OPEN Studio: Scrappy Birds and Recycled Collage Creatures!
Tomorrow at 10:00 AM
Oakland · Junior Center Of Art & Science
Sales end soon
OPEN Studio: Scrappy Birds and Recycled Collage Creatures!
Tomorrow at 10:00 AM
Oakland · Junior Center Of Art & Science
R&B and Thangz w/ Chuy Gomez & Friendz
Thu, Mar 19, 8:00 PM
Oakland · Crybaby
R&B and Thangz w/ Chuy Gomez & Friendz
Thu, Mar 19, 8:00 PM
Oakland · Crybaby
Teen Poetry Slam Last Chance Slam | Youth Speaks
Fri, Apr 10, 5:30 PM
Oakland · Oakstop Boardway Event Hall
Teen Poetry Slam Last Chance Slam | Youth Speaks
Fri, Apr 10, 5:30 PM
Oakland · Oakstop Boardway Event Hall
BBB- Bubbies, Babies and Bagles
Sun, Mar 22, 10:00 AM
Walnut Creek · Tice Valley Community Gym
BBB- Bubbies, Babies and Bagles
Sun, Mar 22, 10:00 AM
Walnut Creek · Tice Valley Community Gym
37th Annual Maya's Spring Music Festival
Sun, Mar 22, 2:00 PM
Berkeley · Ed Roberts Campus
37th Annual Maya's Spring Music Festival
Sun, Mar 22, 2:00 PM
Berkeley · Ed Roberts Campus

Trends in Castro Valley

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Frequently asked questions about Castro Valley

What are the best free events to attend?

According to Eventbrite, the best free events are:

Citywide Clean-up & Community Fair 2026

Salt Marsh Walk

Oakland Career Fair

Community Easter Egg Hunt by The McLane Team

Which events are currently trending in Castro Valley?

The trending searches this month in Castro Valley are:

k pop demon hunters

free events in the bay area

Which free events are coming up?

Discover the best free events happening soon – you don't want to miss them:

OPEN Studio: Scrappy Birds and Recycled Collage Creatures!

Clothing Swap & Block Printing!

Nadine Takvorian's ARMAVENI - Graphic Novel For Teens In-Store Event

Composting is a Hot Topic