This mixed-methods body of research examines elite (World Championship/Olympic level) parenting distance runners and their experiences during pregnancy and postpartum. This research stream has led to numerous publications, consultations, and partnerships with organizations such as &Mother. This work is focused on conducting mixed methods research that explores the ways elite parent athletes negotiate the competing identities of parenthood and professional athletics. We have expanded this research to examine mass participation race events and practices (e.g., pregnancy deferral policies, childcare, and lactation supports) to understand what is currently being done at major marathons to respond to the needs of pregnant and/or parenting participants.