Yesterday, the National Park Service (NPS) announced a limit on snowmobile use in Yellowstone National Park. As expected, NPS will allow 540 snowmobiles per day.
For at least a decade, the limit on snowmobiles in Yellowstone has been the subject of a pitched battle between conservationists and snowmobile advocates. Just before leaving office in Jan. 2001, the Clinton administration banned all snowmobile use in Yellowstone. The Bush administration was able to delay implementation until a federal court invalidated the ban in 2004 in a case brought by the snowmobile industry.