Broncohacks 2026 Pomona, CA, USA Broncohacks is Cal Poly Pomona's 3rd annual intercollegiate hackathon. $2,200 in prizes Apr 25 – 26, 2026 163 participants
BeachHacks 9.0 Long Beach, CA, USA BeachHacks is CSULB's annual hackathon $600 in prizes Mar 21 – 22, 2026 137 participants
RoseHack 2026 Riverside, CA, USA UC Riverside’s largest hackathon: January 24-25, 2026 Non-monetary prizes Jan 24 – 25, 2026 130 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 2164 participants
BeachHacks 8.0 Long Beach, CA, USA CSULB ACM's annual hackathon! $3,990 in prizes Mar 22 – 23, 2025 142 participants
Rose Hack 2025 Riverside, CA, USA Rose Hack is UC Riverside's 24-hour hackathon, one of the few women-centric hackathons in California! $1,832 in prizes Jan 25 – 26, 2025 109 participants