Inside Cal Hacks 2025: A 36-Hour Innovation Marathon

Imagine a bustling hive of creativity, where 2,500 students converge with laptops, air mattresses, and a mission to build something that matters in just 36 hours. Welcome to Cal Hacks 2025, the world's largest collegiate hackathon, held at the historic Exploratorium in San Francisco.

The Energy of a Hackathon

There's something electric about the atmosphere at Cal Hacks. It's like a tech Woodstock—minus the mud, plus a lot of caffeine. Participants, or 'hackers,' as they're affectionately known, are here for the adrenaline rush of creating under pressure.

"A hard deadline compels you to perform," says one San Jose State University student, capturing the essence of the hackathon mindset. It's a sentiment echoed by many who relish the opportunity to dive into new technologies, collaborate with peers, and push their creative boundaries.

Projects That Dazzle and Delight

From AI-powered dance coaches to a K-pop training app, the projects at Cal Hacks are as diverse as they are inventive. One group from Colgate University is building an AI Dungeon Master for Dungeons & Dragons, complete with a Raspberry Pi and computer vision dice detector. Another team is working on an AI mobile app to combat misinformation online.

"We’re making this AI DM so we can all play D&D and no one has to be the DM," explains Colin, a Colgate student. This kind of innovation isn't just about tech; it's about rethinking how we interact with the world.

The Community Spirit

Hackathons are as much about community as they are about coding. Participants often find lifelong friends and future collaborators among their fellow hackers. Networking is a huge part of the experience, with many students landing internships or job offers right on the spot.

One student even wore a shark costume to stand out to potential employers. "It made me stand out," he says. "I’m like, 'Hey, you got an internship for me?' And it was pretty awesome."

Challenges and Triumphs

Of course, no hackathon is without its hurdles. Wi-Fi can be spotty, and sleep is often a luxury, not a necessity. But these challenges are part of the appeal. They force participants to think on their feet and make the most of limited resources.

Why Hackathons Matter

Hackathons like Cal Hacks are more than just competitions; they’re incubators for real-world skills and innovations. Participants gain hands-on experience with cutting-edge technologies and learn to work collaboratively under pressure.

For many, the experience is transformative. "This is my second hackathon," says Tri, who’s working on an ASL translator using motion control and machine learning. "Hackathons and short form projects are really good because I think that I could, in a short amount of time, build projects with people who want to grow as well."

As the final hours of Cal Hacks tick down, the air is thick with the hum of innovation. Projects are polished, demos are prepared, and friendships are forged. Whether it’s a stepping stone to a tech career or simply a weekend well spent, the impact of Cal Hacks resonates far beyond these 36 hours.

Yuki Okonkwo, AI & Machine Learning Correspondent