This paper examines the relative performance and access to mounts of female jockeys in American horseracing, the only major professional sport where female and male athletes directly compete on a regular basis. We modeled the determinants of the probability for a jockey finishing a race “in-the-money”—placing first, second, or third, and the determinants for receiving mounts. Among other findings, the results indicated that the probability for female jockeys finishing a race in the money was not significantly different from male jockeys, ceteris paribus, yet female jockeys continue to receive fewer mounts after controlling for other relevant, observable factors.