TreeHacks 2026 Stanford, CA, USA The largest collegiate hackathon in the US. $1,030,875 in prizes Feb 14 – 15, 2026 1097 participants
TreeHacks 2025 Stanford, CA, USA The largest collegiate hackathon in the U.S. $255,600 in prizes Feb 14 – 16, 2025 827 participants
Cal Hacks 11.0 San Francisco, CA, USA This year's Cal Hacks is co-hosted by Google and Fetch.ai. Together we'll assemble in SF for a weekend of hacking, friendship, and crazy ideas. $188,960 in prizes Oct 19 – 20, 2024 1140 participants
HackDavis 2024 Davis, CA, USA // create for social good_ $20,596 in prizes Apr 27 – 28, 2024 597 participants
LA Hacks 2024 Los Angeles, CA, USA Welcome to the Grand Adventure of LA Hacks 2024 $47,216 in prizes Apr 19 – 21, 2024 704 participants
SDxAI Hackathon San Diego, CA, USA Build the future of AI in San Diego. $23,000 in prizes Jul 15 – 16, 2023 103 participants
HackDavis 2023 Davis, CA, USA // create for social good_ $21,000 in prizes May 20 – 21, 2023 423 participants
Hacky Birthday MLH! 2022 Online Help us celebrate our birthday with some amazing hacks! Non-monetary prizes Winners announced 85 participants
AngelHacks 2.0 Online Choose your workshop, speed-meet your team, and have ALL the tools needed for your project! $14,000 in prizes Winners announced 880 participants
ThetaHacks Online A massive global high-school virtual hackathon - Bringing the world of tech to the next generation of engineers. $20,000 in prizes Winners announced 370 participants
Hack or Treat? Online This halloween spend the weekend hacking at Hack or Treat? and build something spooky! Non-monetary prizes Winners announced 198 participants
NotUniversity Hacks Online Where are our High School and Middle School students at? Non-monetary prizes Winners announced 269 participants
RookieHacks Online Attend your first hackathon or pick up a new programming language at RookieHacks! Non-monetary prizes Winners announced 368 participants