Despite the growing popularity of interdistrict choice plans over the past decade, the policy assumptions underlying their adoption have been subjected to very little empirical research. This study situates school choice within one metropolitan region, Denver, and examines the ways in which choice patterns relate to existing patterns of stratification between school districts. This regional focus offers insight into the patterns of interdistrict choice and the influence these patterns have on equity within a metropolitan region. Findings from this study indicate that relatively higher income students were more likely to take advantage of interdistrict choice, and that choice was more often used by students to exit from a less advantaged context (as measured by socioeconomic status) to a relatively more advantaged one. The article concludes with recommendations for policymakers in designing more equity-minded choice policies. (Contains 5 tables, 2 figures and 9 footnotes.)