As part of our inquiry into how youth development and 4-H programming can affect the development of social capital for youth and for the community, we engaged youth in ripple mapping. Based on this information, we provide a typology of participation structures in youth development activities and the expected bridging and bonding social capital outcomes for each type. This article outlines the key factors underlying the typology and discusses strategies for using the typology to expand the impact of youth development and 4-H programming on young people and communities. It also outlines potential implications for increasing opportunities for fostering social capital leading to a spiraling-up effect for youth, volunteers, and the community.