Stang Hacks Pleasanton, CA, USA The Tri-Valley's biggest high school hackathon $800 in prizes Jan 24, 2026 24 participants
Cal Hacks 12.0 San Francisco, CA, USA This year's Cal Hacks is co-hosted by Claude, Fetch AI, AppLovin, and Amazon's Annapurna Labs! Together we'll assemble in SF for a weekend of hacking, friendship, and crazy ideas. $58,100 in prizes Oct 24 – 26, 2025 2165 participants
A2A - Agents Hackathon San Francisco, CA, USA Creators Corner invites you to turn bold ideas into action with an exclusive A2A hackathon. Join us to build AI agents that push the limits of LLMs and AI applications! $4,500 in prizes Jul 26, 2025 129 participants
Milpitas Hacks 2.0 Milpitas, CA, USA Hackathon for Middle and High School Students in the Bay Area $800 in prizes May 24, 2025 151 participants
Los Altos Hacks IX Sunnyvale, CA, USA The world's largest high school hackathon Non-monetary prizes Apr 5 – 6, 2025 293 participants
