Livestock are authorized to graze over a quarter of the 52 million acres of protected Wilderness in the lower 48 states. Due to grazing language in the 1964 Wilderness Act and its 1980s-era corollary, the Congressional Grazing Guidelines, grazing has been a presence in Wilderness for over half a century. We’ll take a landscape-scale look at grazing in Wilderness, including the evolution of law and policy, effects on the National Wilderness Preservation System, and opportunities for change.