Although the importance of mentorship has been widely recognized, operationalizing and measuring critical components of the mentoring relationship has proved to be a greater challenge. This brief focused on the development of a quantitative measure of mentoring relationships during the college years. The study's findings provide initial evidence for a 24-item, four-component quantitative measure of the mentoring relationship. Specifically, identified were four distinct yet interrelated components that comprise college students' experience of mentorship by faculty and professional staff: (a) challenge, (b) authenticity, (c) commitment, and (d) community. Although findings from this study are promising, future research should focus on the following: (a) administering the 24-item measure to new and diverse samples of participants, with data used to conduct confirmatory factor analyses; (b) expanding the scope of the sample to include students attending larger institutions; (c) exploring differences based on age, gender, race/ethnicity, and other key demographic factors; and (d) examining the association between the mentorship experience and academic, behavioral, and social outcomes.