Undergraduate students are a critical resource for university-community programs that provide enriching learning opportunities for school-age youth who have limited exposure to science, technology, engineering, and math (STEM). Many universities offer afterschool outreach programs that enable youth to interact with science faculty, and many such programs depend on undergraduates as facilitators. However, education research has focused on the youth served rather than on the undergraduates who facilitate the outreach programs. To study why undergraduates participate in youth programming, the authors conducted a qualitative exploration of the experiences and perspectives of women undergraduates who facilitated an afterschool program that engages girls and nonbinary youth with scientists and engineers of similar gender identities. The authors focused on identifying the motivations and interests of these undergraduate facilitators in an effort to understand their views about the potential benefits of participation. This study sheds light on undergraduates' reasons for devoting time and energy to university-community STEM programs. The findings may help other university-community programs grow in their support of undergraduate facilitators.