How can indigenous evaluators implement culturally competent models in First Nations communities while ensuring that government grant evaluation requirements are met? Through describing the challenges in one tribal community in the United States, this article will discuss how American Indian/Alaska Native substance abuse prevention programs are evaluating the implementation and outcomes of Strategic Prevention Framework grants from the federal government's Center for Substance Abuse Prevention. Requirements for implementing evidence-based programs normed on other populations and for evaluating data based on quantitative methods add to the challenge. Throughout the process, much is being learned that it is hoped will strengthen indigenous grantees and increase the cultural competence of government evaluation requirements. (Contains 2 figures.)