DiamondHacks 2026 San Diego, CA, USA San Diego's Largest Hackathon $25,710 in prizes Apr 4 – 5, 2026 366 participants
BeachHacks 9.0 Long Beach, CA, USA BeachHacks is CSULB's annual hackathon $600 in prizes Mar 21 – 22, 2026 137 participants
World’s Largest Hackathon presented by Bolt Online Build with AI for a shot at some of the $1M+ in prizes. $1,037,500 in prizes Winners announced 128419 participants
DiamondHacks 2025 San Diego, CA, USA San Diego's Fastest Growing Hackathon $2,853 in prizes Apr 5 – 6, 2025 302 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
