In the Western U.S., the forest carnivores in this assessment are limited to boreal forest ecosystems. These forests are characterized by extensive landscapes with a component of structurally complex, mesic coniferous stands that are characteristic of late stages of forest development. This report assesses the scientific basis for conserving the American marten, fisher, lynx, & wolverine. It consists of literature reviews for each species & a discussion of management considerations & information needs. Comprehensive!