Spending time in the outdoors is a pastime for many Americans and that has recently become threatened. With the establishment of Yellowstone National Park in 1872, Congress first solidified the commitment to preserving areas that were wild and pristine for recreational use. Forest Reserves, a predecessor of the National Forest system, were then set aside to further manage these precious outdoor sanctuaries. The formation of the National Park Service in 1916 was the final step "to conserve the scenery and the natural and historic objects and the wildlife therein and to provide for the enjoyment of the same in such manner and by such means as will leave them unimpaired for the enjoyment of future generations." Though in these modern days of fast food and rush hour traffic, there is a new threat that could not have been foreseen in the National Forests: off road vehicles (ORVs).