This paper reports on an application of two modeling systems in the assessment and planning effort for a 58,038-acre area on the Bitterroot National Forest: SIMulating Vegetative Patterns and Processes at Landscape ScaLEs (SIMPPLLE), and Multi-resource Analysis and Geographic Information System (MAGIS). SIMPPLLE was a useful model for tracking and analyzing an abundance of spatial data and processes, providing a good depiction of landscape patterns over time. Concerns were raised by Forest specialists about the predicted levels for a few of the fire and insect processes. MAGIS was an effective model for calculating watershed effects and some wildlife effects and was used to select some of the harvest treatments in the selected alternative. Problems in the application of MAGIS included the time needed for data cleaning and preparation, and the information projected for future stands provided a weak basis for estimating some wildlife effects.