Los Altos Hacks X Sunnyvale, CA, USA The world's largest high school hackathon. Non-monetary prizes Apr 11 – 12, 2026 279 participants
LancerHacks IX Mountain View, CA, USA LancerHacks IX is the ninth annual twelve-hour hackathon. This year, LancerHacks will take place in person from 7:45 AM to 10 PM on a Saturday March 21, 2026. Non-monetary prizes Mar 21, 2026 43 participants
AeroHacks 2026 Dublin, CA, USA AeroHacks is a fast-paced, beginner-friendly hackathon where creativity meets technology. AeroHacks is all about learning, experimenting, and having fun with code!! $8,520 in prizes Mar 6, 2026 27 participants
AI 4 Alzheimer's Online Build AI models for early Alzheimer’s detection. Make an impact in healthcare. Save a life. $500 in prizes Winners announced 1450 participants
Monta Vista Web Dev Hackathon Online First ever iteration of the Monta Vista Web Dev Hacks! Create a Web App to Improve Our School in Any Way! $80 in prizes Winners announced 120 participants
East Bay Hackers' Winter Hackathon San Francisco, CA, USA Our Second Hackathon for anybody interested in coding or technology! $10,438 in prizes Dec 6, 2025 84 participants
Grizzly Hacks Fall 2025 Online Create, Compete, and Stand Out. $8,500 in prizes Winners announced 121 participants
MountainHacks 2025 Mountain House, CA, USA Hack the Heights - A 12-hour hackathon for high-school students of all experience levels, taking place on November 8th at MHHS! $12,460 in prizes Nov 8, 2025 188 participants