The purpose of this application manuscript is to address assessing and evaluating the impact of leadership mentoring programs on collegiate mentors. Specifically, this paper addresses the nuanced considerations of creating appropriate program outcomes and associated objectives given the individualized nature of mentoring relationships. Additionally, the current paper discusses assessment and evaluation strategies to demonstrate impact of leadership mentoring on the collegiate mentor via a three-year program evaluation effort. By innovating leadership mentoring program practice, leadership educators can more soundly design and deliver leadership mentoring programs and more precisely measure and demonstrate impact.