Visitors to National Parks expect pristine wilderness, but such habitats may be the last thing we see while vacationing there. My recent trip to Yellowstone led to concern about our park system as a refuge for wildlife. Roads in National Parks are a harsh obstacle for wildlife, with hundreds of animals struck or killed each year. U.S. National Parks share a seemingly contradictory mission to preserve ecosystems while providing humans with recreational opportunities. For example, Yellowstone’s “Sustainable Practices” literature highlight a variety of environmental stewardship initiatives, from using hybrid cars to recycling, but with no mention of road kill in the park.