DiamondHacks 2026 San Diego, CA, USA San Diego's Largest Hackathon $25,710 in prizes Apr 4 – 5, 2026 366 participants
Los Altos Hacks VII Sunnyvale, CA, USA The largest hackathon in the world for high schoolers. $42,164 in prizes Apr 8 – 9, 2023 348 participants
