HackDavis 2026 Davis, CA, USA // create for social good_ Non-monetary prizes May 9 – 10, 2026 429 participants
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
FullyHacks 2026 Fullerton, CA, USA CSUF's premier 24-hour hackathon, uniting 150+ students to build impactful projects, network with industry pros, and compete for prizes. $1,000 in prizes Apr 18 – 19, 2026 165 participants
Citrus Hack 2026 Riverside, CA, USA Mission Accepted | Citrus Hack XI at UC Riverside Non-monetary prizes Apr 18 – 19, 2026 140 participants
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
Datathon 2026: Data4Good Santa Barbara, CA, USA Collaborate, innovate, and build data-driven solutions to tackle real-world challenges and shape the future of technology. $3,500 in prizes Feb 21 – 22, 2026 100 participants
SB Hacks XII Isla Vista, CA, USA Make Waves at UCSB's 12th Annual Hackathon Non-monetary prizes Jan 10 – 11, 2026 342 participants