This case study discusses the process of conducting research that analyzed the impact of an organized movement for marijuana policy reform in Texas. My interest in this topic came from my professional role as a drug policy researcher and my initial involvement with the reform movement. This is an example of inductive case study research. The primary methods of data collection were participant observation and semi-structured interviews. These data sources were triangulated with review of relevant documents, including organization material, legislative decisions, and media coverage. The relationship between participant observation and interview research, the benefits and challenges of each, and the relevance of these data collection tools to the study of the marijuana movement in Texas are discussed.