This paper presents a study that investigated how mentors perceived their long-term relationships with teacher candidates in a secondary teacher preparation program. The study describes the process by which the teacher candidates and the mentors select each other and how the relationship develops, with findings that suggest that the length of time teacher candidates and mentor teachers work together as essential to building trust. Mentors identify themselves as quasi-teacher educators who serve as an extension to the university preparation process. Findings explore the benefits of mentoring for the prospective and practicing teachers as well as to teacher preparation in general. To optimize the value of field experience, it is important to understand this relationship and its outcomes.