Haunted Hacks: Real-Time AI Edition
Y Combinator · Hackathons · Register ↗
Details and registration on the event page.
TestMu AI Agent Party Meetup
When Saturday, October 31, 2026 · 10:00 AM to 2:30 PM
Where TestMu AI (Formerly LambdaTest), Bay Area
Host TestMu AI
About this event
Details and registration on the event page.
More events in Bay Area on October 31
Saturday, October 31
12 events
Builders who Run SF — 5K
Solo Founders · Embarcadero · Register ↗
Details and registration on the event page.
AI in Action Women Building What Is Next
Reut Lazo & Jenny Kay Pollock · Register ↗
Join WOMEN x AI and TechCon Global for an in-person gathering at Google Huddle for women building, leading, and using AI. We’ll move beyond the headlines to talk about what it takes to build useful AI products, find early traction, and adopt AI responsibly.
STRANGER BUILDS I 10k in PRIZES I Halloween hackathon
NERDCONF & Phebe Polk · Mid-Market · Register ↗
STRANGER BUILDS 🎃 The nerdiest Halloween hack ever. This is the San Francisco edition of Stranger Builds. ...what will you bring to life? Find your first users in 7 days. Meet other builders, build something strange, and get real people using it.
Retreat, Yourself: Library Writing Crawl — Menlo Park Library
Lindsay Lackey · Menlo Park Library · Register ↗
Writing alone is hard. Writing alone, together , is somehow easier. Re treat, Yourself hosts free library crawls twice a month in the Bay Area. A different, lovely library each time, writing alongside other writers. These are zero-pressure day retreats.
Spooky Indoor Picnic & Craft Night: Edición San Francisco 👻🎃
Glow & Chisme Social Club · Mission District · Register ↗
Un espacio exclusivo y aesthetic para conectar, crear y celebrar Halloween entre mujeres latinas del Bay Area. ¡Hola, chicas de SF! 🕵️♀️ ¡El misterio y el otoño se apoderan de la ciudad y lo celebraremos en grande!
Paint in the Park - South Bay 🎃 Halloween Edition
Mahima C & Saumay khandelwal · Sunnyvale West · Register ↗
Come spend a slightly spooky afternoon painting with us in the park. 🎃 For this Halloween edition of Paint in the Park - South Bay , we’ll be painting together in small groups with an optional Halloween-inspired prompt.
Boo on the Block 🎃 Family Halloween Festival
Cassandra McClure & Ali Hall · Crescent Park · Register ↗
Grab your costumes and join neighbors and friends down the haunted driveway for an open-air Halloween celebration before trick-or-treating Presented by Clean Living Magazine . 🎃 Read all about it in the latest publication.
Beacon Halloween Party
Cristina Riboni · The Beacon · Register ↗
Join your neighbors for a spook-tacular Halloween and a frightfully fun evening at The Beacon!
halloween darty
kavya & Modibo · 1402 15th St · Register ↗
wait what r u supposed to be? .... im so glad u asked come dressed up as ur favorite niche reference or subject to info dump abt, nothing spookier than activating sum1s special interest in convo r we right??
Glow in the Streets
Voronoi (V. Blue) & Hammer · The Castro · Register ↗
Come discover a pocket universe of neon lights and queer delights. Wear a costume and come on down to Glow in the Streets on Saturday, October 31st from 5–10pm in the heart of the Castro District of San Francisco.
GRAND TEMPORAL JUNCTION: DISPATCH FROM SAMSON RANCH ⏳⚡
Jay Samson · Central San Jose · Register ↗
A rupture in the space-time fabric has localized over Samson Ranch. For All Hallows' Eve, chronological containment has collapsed, opening a corridor straight into an 1800s frontier yard, where the Cantina is open, the blacksmith forge is glowing, and the…
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