http://www.mtstandard.com/news/state-and-regional/article_94c8ecaa-188e-11e0-bcad-001cc4c03286.html
....."It's not one of the approved means of winter travel," said Tim Reid, Yellowstone's chief ranger.
Under Yellowstone's winter management plan, the only ways to enter the park in winter are by approved snowmobiles and snowcoaches, on cross-country skis or snowshoes.....
The cure for a fallacious argument is a better argument, not the suppression of ideas.
-- Carl Sagan