The EarthConnections San Bernardino Alliance is one of three regional alliances supported by the national EarthConnections Collective Impact Alliance, funded by a pilot grant from the National Science Foundation INCLUDES program. All three of the regional alliances share a common vision, focused on developing a diverse geoscience workforce through connecting existing programs and institutions into regional pathways that support and guide students from engagement at an early age with Earth science related to issues facing the local community, through the many steps and transitions to geoscience-related careers. The San Bernardino Alliance began with collaboration between one university, one community college and one high school and also includes the Southern California Earthquake Center and professional geologists in the region. Based on discussions at an opening round table event, the Alliance chose to capitalize on existing geology student clubs and deeply engaged faculty and alumni at the educational institutions involved in the Alliance to plan joint, multi-institutional activities for students at various stages along the pathway, including field trips, service learning projects, guest speakers, and visits to dinner meetings of the local professional societies. The underlying motivation is to connect students to their peers and to mentors at institutions that represent the next step on the pathway, as well as to expose them to careers in geology and to geoscience issues that impact the local community. A second type of intervention we are undertaking is to promote high quality teaching in introductory Earth science courses at the university, community college and high school levels, including the development of an honors geology course at the participating high school. To this end we hosted an NAGT traveling workshop focused on using active learning and societally relevant issues to develop engaging introductory geoscience courses, including those that are offered in large lecture halls.