The inequities of residential segregation and their impact on educational opportunity are a national problem, but greater metropolitan Boston has a particularly problematic history in terms of the extent to which racial segregation has deeply divided the city into separate and unequal systems of opportunity. Despite decades of policy efforts to desegregate Boston, racial segregation has persistently dominated residential patterns in the Boston metropolitan area, and, because it is so linked to inequality of schools and communities, minority children tend to be particularly disadvantaged by the persistence of this form of social stratification. Given existing research that has already established inequities in K-12 education, the purpose of the study described in this report is to examine the potential impact of geographic origin within the Boston metropolitan area on postsecondary access-oriented outcomes such as SAT scores and number and types of applications to postsecondary institutions. More directly, this study provides a descriptive picture of how students from different types of geographic environments in the greater Boston metropolitan area and of different racial and ethnic backgrounds experience opportunities for postsecondary educational access. The authors find that pathways to college are strongly related to residential segregation even after other factors such as income are taken into account. (Contains 14 tables and 10 figures.)