This dissertation explores the design of inclusive and equitable collegiate hackathons. Hackathons are events where people gather together to build projects or solve problems. Collegiate hackathons can create an environment where marginalized students feel disinterested in attending or unwelcome. A disproportionate number of white and Asian men attend these events compared with women, non-binary students, and non-Asian students of color. The dissertation studies the social climate of hackathons and how it affects participants, particularly women and non-binary students. Why do (or do not) participants attend hackathons, what motivates them to attend, and what engages them?