This federally mandated study summarizes federal policies and regulations and identifies issues relevant to wilderness accessibility for people with disabilities. The report is based on review of existing federal policies and regulations; a survey of federal unit managers of the National Wilderness Preservation System (NWPS); a survey of programs and outfitters that have provided services to persons with disabilities in the NWPS; and a survey of users of the NWPS who have disabilities. The study found that three of the four federal agencies responsible for wilderness management (National Park Service, National Forest Service, and the Bureau of Land Management) have policies allowing the use of wheelchairs within the NWPS, though the Forest Service policy does not allow the use of electric (motorized) wheelchairs. The fourth federal agency, the Fish and Wildlife Service, intends to adopt policies similar to those of the other land-managing agencies. Managers of NWPS units estimated that a total of 16,767 people with disabilities use the NWPS each year. A significant majority of survey respondents with disabilities very much enjoy the NWPS, and 76 percent do not believe that the restrictions on mechanized use stated by the Wilderness Act diminish their ability to enjoy the wilderness. People with disabilities appear to visit the NWPS in the same ways and for the same reasons that people without disabilities do. Five recommendations for federal policy and procedures conclude the report. Appendixes contain copies of surveys and cover letters, tabulations of survey responses, a list of study participants, and biographies of members and staff of the National Council on Disability. (JDD)