 Developments within backcountry areas are generally limited to trails, unpaved roads, and administrative facilities associated with dispersed recreational use.Dispersed recreational use is the most prevalent human use in backcountry areas, although research activities may also occur.The NPS defines wilderness within US national parks as any "backcountry areas which have been specifically designated as part of the National Wilderness Preservation System or any other area that has been determined to possess the characteristics of wilderness as defined by Section 2(c) of the Wilderness Act".