Student participation in undergraduate research programs has been linked to improved content knowledge, skills, and confidence. However, few research opportunities exist for community college students. This study explores the positive effects of a summer research program on three diverse cohorts of such students. The Transfer-to-Excellence Research Experiences for Undergraduate program is a hands-on summer research internship for California community college students. The program seeks to inspire students to complete a Bachelor’s degree in science or engineering and primarily serves identities underrepresented in those fields. Analysis of mixed methods evaluation data shows that after participating in the program, community college students were better able to find scholarly resources, design ethical scientific experiments, conduct independent research, and analyze data. Additionally, participation in the program enhanced students’ science identity and confidence to pursue further education and careers in science and engineering fields.