HackAmerica Online America's Largest Hackathon for High School Students $575 in prizes May 23, 2026 02:00 PM EDT to submit 492 participants
EcoHacks Online Build anything using STEM that relates to the environment. Your project can be a program, model, simulation, analysis, or any creative technical idea. $500 in prizes Winners TBD 191 participants
Los Altos Hacks X Sunnyvale, CA, USA The world's largest high school hackathon. Non-monetary prizes Apr 11 – 12, 2026 279 participants
