We reintroduced fishers to the Stirling Management Area of Sierra Pacific Industries (SPI) in northern California that straddles the southern Cascade and northern Sierra Nevada mountain ranges. Stirling is located in portions of Plumas, Butte and Tehama counties of California. Stirling encompasses 648 km2 and the elevation ranges from 424 to 2080 m (~1000 to 6800 feet) with peaks of up to 2400 m located just to the east. The climate on Stirling is temperate with the majority (>85%) of precipitation coming in late fall and winter, as snow fall and rain, and little precipitation occurring in other seasons. Vegetation on Stirling is typified by the Sierra Nevada mixed conifer forest with 6 dominant trees species: Ponderosa pine (Pinus ponderosa), Sugar pine (Pinus lambertinia), Incense cedar (Calocedrus decurrens), white fir (Abies concolor), Douglas fir (Pseudotsuga menziesii), and California black oak (Quercus kellogii). Tanoak (Lithocarpus densiflorus) and Canyon live oak (Quercus chrysolepis) are notable as well, as they may form dense stands at these same elevations .