San Francisco, CA

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Free Things to Do in San Francisco, CA

Free events, festivals, and activities happening in San Francisco, CA.

Bop-Nite: R&B, Oldies, Garage and Rock n' Roll

Fri, Oct 23 · 10:00 PM

Bop-Nite: R&B, Oldies, Garage and Rock n' Roll

Hit Me: Throwback Party @ The Valencia Room

Fri, Oct 23 · 10:00 PM

Hit Me: Throwback Party @ The Valencia Room

The Valencia Room

ONE NIGHT ONE HOUSE 🎃

Fri, Oct 23 · 10:00 PM

ONE NIGHT ONE HOUSE 🎃

Inaugural Halloween Pumpkin Contest

Inaugural Halloween Pumpkin Contest

Hack for Social Impact 2026

Sat, Oct 24 · 9:00 AM

Hack for Social Impact 2026

1885 Mission St

Anything Applied Agentic Hackathon - hackathons.team

Sat, Oct 24 · 9:00 AM

Anything Applied Agentic Hackathon - hackathons.team

Kane CLI Hack Day, supported by OpenAI

Sat, Oct 24 · 9:30 AM

Kane CLI Hack Day, supported by OpenAI

Physical AI for Science Hack @ Studio 45 with Claude Community

Sat, Oct 24 · 9:30 AM

Physical AI for Science Hack @ Studio 45 with Claude Community

Agent Builders Hackathon

Sat, Oct 24 · 10:00 AM

Agent Builders Hackathon

Canvassing at Ingleside in San Francisco

Sat, Oct 24 · 10:00 AM

Canvassing at Ingleside in San Francisco

Rafe & Philip turn 6

Sat, Oct 24 · 11:30 AM

Rafe & Philip turn 6

Larsen Playground

UnCommon Heroes Picnic: Homecoming - 20th Anniversary

Sat, Oct 24 · 12:00 PM

UnCommon Heroes Picnic: Homecoming - 20th Anniversary

Cass Hosts Volleys & Vibes: SZN 6 x WEEK 17

Sat, Oct 24 · 1:00 PM

Cass Hosts Volleys & Vibes: SZN 6 x WEEK 17

Crocker Amazon Tennis Courts

Ableton Sessions 2/6

Sat, Oct 24 · 2:00 PM

Ableton Sessions 2/6

SF Bay Sail on brigantine Matthew Turner 10/24/26

Sat, Oct 24 · 2:00 PM

SF Bay Sail on brigantine Matthew Turner 10/24/26

Bay Model Visitor Center

Climate Action Book Club: The Art of Gathering

Sat, Oct 24 · 3:00 PM

Climate Action Book Club: The Art of Gathering

Washington Park

SF Blackout: Gambits & Ghouls Chess Game Night (Spark Social)

Sat, Oct 24 · 3:00 PM

SF Blackout: Gambits & Ghouls Chess Game Night (Spark Social)

SPARK Social SF

Nightmare on Polk St: Halloween Day Party (Day 1) | Providence SF

Sat, Oct 24 · 3:00 PM

Nightmare on Polk St: Halloween Day Party (Day 1) | Providence SF

Providence Night Club

Bay Area Derby Halloween Season Closer

Sat, Oct 24 · 4:00 PM

Bay Area Derby Halloween Season Closer

Richmond Memorial Auditorium

UNDSCVRD Golden Hour Night Market

Sat, Oct 24 · 4:00 PM

UNDSCVRD Golden Hour Night Market

Q Sangha

Sat, Oct 24 · 5:30 PM

Q Sangha

The San Francisco Dharma Collective

Underground Open Mic

Sat, Oct 24 · 6:30 PM

Underground Open Mic

The Empire Strips Back

Sat, Oct 24 · 7:00 PM

The Empire Strips Back

Victoria Theatre - San Francisco

Kirtan with Anthony (In Person)

Sat, Oct 24 · 7:30 PM

Kirtan with Anthony (In Person)

The San Francisco Dharma Collective