This article examines how 18 teachers, counselors, administrators, and support staff from seven New York City public high schools collaborated during the Black and Latino Male Professional Development Initiative (a pseudonym) to develop a "culturally relevant, schoolwide, college-going culture" supportive of Black and Latino males' college readiness and access. We draw from a mixed-methods empirical research study to discuss participants' changing understandings of the features of such a culture, and how participants' action plans illuminate steps for change in their schools. We provide recommendations for creating equitable educational opportunities for Black and Latino males supportive of access to postsecondary education.