The Interagency Transportation, Land Use, and Climate Change Pilot Project utilized a scenario planning process to develop a multi-agency transportation- and land use-focused development strategy for Cape Cod, Massachusetts, with the intention of achieving a reduction in future greenhouse gas emissions and considering the potential impacts of sea-level rise on the region. This scenario was developed through a process of data collection, scenario development by a consultant and by regional and local government during a workshop, and scenario assessment. The outcomes of this scenario planning process will inform and support the region's long-range transportation planning and other related efforts, as well as the planning efforts of local, state, and federal agencies. Project members collaborated to document the project's steps and to offer significant observations and recommendations that can inform future applications.