The U.S. Forest Service is responsible for managing over 35 million acres of designated wilderness, about 18 percent of all the land managed by the agency. Nearly all (90 percent) of the National Forests and Grasslands administer designated wilderness. Although the central mandate from the 1964 Wilderness Act is that the administering agencies preserve the wilderness character in these designated areas, the concept of wilderness character has largely been absent in Forest Service efforts to manage wilderness. The purpose of this document is to help National Forest planners, wilderness staff, and project leaders apply in a practical way the concept of wilderness character to forest and project planning, the National Environmental Policy Act process, on-the-ground wilderness management, and wilderness character trend monitoring that is relevant to an individual wilderness.