This Natural Resource Condition Assessment (NRCA) report and accompanying geodatabase is designed to give the resource managers of Nez Perce National Historical Park (NEPE) a better understanding of the condition of natural resources within and adjacent to the park. Assessment of the natural resources was accomplished by conducting a thorough literature review, evaluating existing data, and also collecting new data on areas of the park where sufficient, reliable data for an assessment was not available. Aquatic and upland habitats were assessed and treated separately in the report. Selected threats and stressors to NEPE's natural resources were evaluated for the entire park. Information gained from this report will form the basis for development of actions to reduce and prevent impairment of NEPE's natural resources and assist in the development of desired future conditions through park planning processes.