The Interior Northwest Landscape Analysis System is a partnership among researchers and natural resource managers from both the public and private sectors. The project is an effort to increase our understanding of the role of vegetative succession, natural disturbance, and management actions at the watershed scale. The effort will advance the development and application of integrated landscape-level planning tools (models, methods, and information) that use consistent assumptions and common data. Focusing on the subbasin (landscape units of about 202 300 ha) and smaller scales, we will demonstrate the use of existing and new landscape simulation tools to project future succession, disturbance, and management under various policy scenarios. These scenarios will compare different approaches to achieving short- and long-term ecosystem goals and the effects of regulatory constraints, ownership patterns, and limited budgets. Of specific interest is the measurement of the long-term cumulative effects of fuels management and other treatments on key resources. The project is using a 178 000 ha watershed in northeast Oregon to prototype modeling tools and methods. The results of landscape simulations will help to inform the debate over sustainability of forest, range, and aquatic ecosystems in the intermountain West.