DiamondHacks 2026 San Diego, CA, USA San Diego's Largest Hackathon $25,710 in prizes Apr 4 – 5, 2026 366 participants
UC Berkeley AI Hackathon 2025 Berkeley, CA, USA Come join us at the world's largest AI Hackathon hosted by Cal Hacks! $41,564 in prizes Jun 21 – 22, 2025 1036 participants
AI in Action Online Innovate Together: A Multi-Partner Google Cloud Hackathon $50,000 in prizes Winners announced 6698 participants
LA Hacks 2025 Los Angeles, CA, USA Expand your horizons at LA Hacks 2025! $60,282 in prizes Apr 25 – 27, 2025 583 participants
HackMerced IX Merced, CA, USA Ninth iteration of the biggest hackathon in the San Joaquin Valley! $15,161 in prizes Mar 8 – 10, 2024 165 participants
Epsilon Hacks Online Solving Tomorrow's Problems Today $20,122 in prizes Winners announced 243 participants
MatadorHacks Santa Clara, CA, USA Create amazing tech projects that solve important problems in our society, while learning new skills and having fun. $82,000 in prizes Apr 6 – 7, 2019 72 participants
HSHacks IV East Palo Alto, CA, USA The biggest high school hackathon is back! Build a mobile app, website, Alexa skill, VR game, or just about anything else! $5,036 in prizes Oct 20 – 21, 2018 104 participants
