In this paper we focus on California high school students' transition to community colleges. Our unique dataset tracks five cohorts of California high school juniors into their freshmen year at in-state community colleges. We evaluate the extent to which high school achievement tests (currently not utilized by community colleges in course placement decisions) are useful for predicting academic success at community college. In addition, given persistent disparities in college attainment by race, we explore whether this fundamental relationship between high school achievement, college course-taking, and performance differs for students from different racial/ethnic backgrounds. (Contains 7 tables, 6 figures, and 13 footnotes.)