This paper examines some of the secondary or indirect consequences of multistakeholder collaborative processes in the environmental arena. Its thesis is that such collaborative processes constitute fertile ground for participating actors to experience change in their subjective understandings of and relationships to each other, themselves, and environmental action. This exposition draws upon ethnographic research performed with a U.S.-based multistakeholder environmental partnership over a two year period in 1997–1998 as well as a theoretical perspective conceptualizing these personal transformations in terms of social learning, cultural production, and identity formation. Three main findings are explored that support the proposed thesis. The first concerns contributions toward personal transformation made by typical partnership structures and operations. The second pertains to the existence of a commonly shared belief among partnership participants demonstrating an expectation for such changes. The third involves evidence that such transformations actually do take place. Examples from the case study include changes to participants understandings of other environmental stakeholders, the development of new relationships among participating actors, the adoption of new ways of approaching environmental problem solving and decision making, and the formation of altered identities. The paper explores some of the implications, both positive and negative, that this transformative quality of multistakeholder environmental partnerships has for both environmental problem solving and some of the enduring conflicts that have impeded satisfying environmental action in the past. Finally, recommendations are made for how practitioners may organize, manage, and evaluate multistakeholder partnerships to promote such changes