This article draws on a larger study investigating the social networks and help-seeking practices of Mexican-origin youth in San Diego, California. The authors present the subset of findings concerning adult, nonfamily informal mentors and role models. Using survey data, interviews, and a critical ethnographic perspective grounded in sociological theory, the article examines participating adolescents' critical understandings of these significant figures in their lives, the rare and fortuitous nature of these relationships, and their empowering influence in the lives of urban, low-income, immigrant Latino youth. Linkages to social capital and developmental theories are offered.