Los Altos Hacks X Sunnyvale, CA, USA The world's largest high school hackathon. Non-monetary prizes Apr 11 – 12, 2026 279 participants
Hack4Hope Make your Mark in the Fight Against Cancer with the American Cancer Society Cancer Action Network! $2,075 in prizes Aug 9, 2025 111 participants
HackaKhan 2025 Mountain View, CA, USA Khan Lab School's 3rd annual hackathon, open to ages 13-18! Non-monetary prizes Jun 8, 2025 49 participants
Pike Labs App Challenge Online Create a web or mobile app that utilizes real world data to solve a problem for an individual user $3,000 in prizes Winners announced 243 participants
Milpitas Hacks 2.0 Milpitas, CA, USA Hackathon for Middle and High School Students in the Bay Area $800 in prizes May 24, 2025 151 participants
Hack Cupertino 2025 Cupertino, CA, USA A high-school hackathon organized by the Cupertino YAB and Cupertino's Recreation Department to give teens a chance to destress, be creative, and become civically engaged. Non-monetary prizes Apr 12 – 13, 2025 90 participants
Blu's Hacks 2025 San Jose, CA, USA Branham High's sixth annual hackathon: By students, for students Non-monetary prizes Mar 23, 2025 75 participants