The study of participants’ motivations in sporting events is a recurring topic that provides valuable information for stakeholders interested in the event’s success. This motivation structure varies between geographies and evolves, so addressing new case studies from fresh perspectives updates and enriches the knowledge on the subject. Through a survey of 416 participants in the Córdoba Half-Marathon, Spain, we aim to explore the existence of new dimensions of motivation to participate in running events, as well as to analyse if there are statistically significant differences between men and women in their participation motivations and the magnitude of these differences. To this end, an Exploratory Factor Analysis (EFA) has been conducted, and the Mann–Whitney U and Hedges’ G statistics have been utilised. The results of this research complement previous studies with two new dimensions of motivation: inclusivity at various levels and the posting of images on social networks. Additionally, the leading role of female participants is evident, as they are more motivated than men to compete and surpass themselves.