This study examines an innovative model program for the mentorship of diverse graduate students entitled the "Inter-Ethnic/Interdisciplinary Mentoring Institute for Graduate Education" (i.e., "Mentoring Institute"), which was established by the Graduate Student Diversity Programs in the Office of the Vice President for Research at the University of Virginia (UVa). The Mentoring Institute was created to promote an inclusive environment for graduate students from diverse backgrounds as well as to provide support for and increase the number of students of color who successfully matriculate and graduate from UVa. A comprehensive program evaluation was conducted that assesses the mentoring experiences of UVa graduate students who participate in the Mentoring Institute. The evaluation data reveals how graduate students' involvement in the Mentoring Institute has positively impacted their academic and social experiences as well as their feelings of connectedness to UVa's professional community. The evaluation also assesses ongoing activities, professional trainings, workshops, and other support mechanisms provided for graduate students by the Mentoring Institute. In all, graduate students who participated in the Mentoring Institute evaluation indicated that the program has contributed significantly to their academic success, social well being, and feelings of connectedness to the UVa graduate school community. This study should particularly benefit administrators, faculty, students, and higher education professionals who are interested in multicultural graduate student development at predominately White institutions of higher education.