Massachusetts Institute of Technology's Undergraduate Research Opportunities Program has been around for over 30 years and is seen as "one of the most important means for students to foster mentoring relationships with faculty and research staff." By analyzing data obtained through semi-structured interviews and survey results, a typology of supervisors was formed to delineate whether students consider their UROP supervisor to be a mentor. Quantitative findings suggest that those who participate in UROP are only slightly more likely to find mentors at MIT when compared to those who had not participated in the program. Further secondary data analysis suggests that faculty interaction is a better variable to use (than UROP participation) when attempting to explain variation in whether students found mentors at MIT. (Contains 6 tables and 2 figures.)