Participation in Advanced Placement (AP) classes and AP test-taking are widely viewed as indicators of students' college readiness. We analyzed enrollment in AP courses and AP test outcomes in Arizona to document disparities in students' access to rigorous curricula in high school and outline some implications of these patterns for education stakeholders. Findings suggest that although 80% of high schools in Arizona offered at least one AP course, the total number of AP courses offered varied considerably across schools. Small schools and schools that served higher percentages of minority students were less likely to offer a wide range of AP courses than large schools and schools with majority White student populations. Although Hispanic students were underrepresented in AP courses, they had the highest test-taking rate. Only a third of the Hispanic students who took AP courses passed the AP test.