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
HackMerced XI Merced, CA, USA Build a project, meet peers and mentors, learn new skills at our workshops and win prizes! Join us on March 6th to March 8th for the largest hackathon in the San Joaquin Valley! Non-monetary prizes Mar 5 – 8, 2026 115 participants
