ETH San Francisco San Francisco, CA, USA ETHSanFrancisco - World's Biggest Ethereum Hackathon $183,500 in prizes Oct 5 – 7, 2018 378 participants
YC Hacks Mountain View, California, USA Make something people want. $12,710 in prizes Aug 2 – 3, 2014 529 participants
MHacks Ann Arbor, Michigan, USA Looking for the most recent MHacks? : http://mhacks8.devpost.com/ $31,760 in prizes Sep 20 – 22, 2013 613 participants