Sexual violence (SV) impacts adolescents at rates higher than most other age demographics. Although it is a critical public health issue for youth, there are few prevention initiatives that lead to reductions in SV. There is increasing recognition that SV prevention efforts may be most effective if youth are central to the development and implementation of such efforts. Problematically, there are no rigorously evaluated youth-led SV prevention efforts, and researchers also know little about the process by which youth create prevention initiatives. Teen UP (TU) is a youth-led initiative in Rapid City, SD that focuses on addressing a variety of public health issues, including awareness about SV. This "homegrown" initiative is well integrated in the community and is the ideal platform on which additional multi-level, evidence-based SV prevention strategies can be added. Researchers and SV prevention specialists at the University of New Hampshire, in partnership with Rape Prevention Education-funded agencies in South Dakota (SD) (i.e., Network Against Family Violence and Sexual Assault [The Network] and Working Against Violence Inc. [WAVI]), will work together along with a number of community stakeholders (e.g., educators, peers, elders) and expert consultants to enhance TU to include additional SV prevention strategies, a project titled Youth Voices in Prevention (Youth VIP). Although the plan for the programming enhancement will be refined based on feedback from the Research and Programming Advisory Board (RPAB) and data collected during the refinement and planning phase of the project, the current plan is to convene a youth summit where high school youth will be trained as popular opinion leaders to diffuse SV prevention messages in addition to youth joining a formal working group specific to a SV prevention strategy that also aligns with youth's career aspirations. A mixed method approach will be used to measure implementation processes, fidelity, and costs over time, and to assess the impact of Youth VIP on rates of sexual violence among middle and high school students and intermediate outcomes including positive bystander actions, and indicators of positive youth development. Collaboration with the community of students, parents, and professionals in Rapid City will be promoted by establishing a Research Programming Advisory Board (RPAB) that will meet monthly during the project.