This article reports data from a 4-year longitudinal evaluation of a project from the United Kingdom. The project focused on outdoor activities as a vehicle for enhancing the personal and social development of disaffected youth. Specifically, the researchers examined the role played by volunteer learning mentors. The findings suggest the potential for mentors to function as informal educators in such youth programs. However, a lack of preparation and the considerable challenges faced in establishing and maintaining mentoring relationships with young people in schools can restrict their impact.