Special Regulations; Areas of the National Park System

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This rule governs winter visitation and certain recreational use in Yellowstone and Grand Teton National Parks and the John D. Rockefeller, Jr. Memorial Parkway. This final rule is issued to implement the Record of Decision (ROD) for the Winter Use Plans Final Environmental Impact Statement (FEIS) approved November 20, 2007, and will ensure that visitors have an appropriate range of winter recreation opportunities that are appropriate to the national park setting, and that these activities do not impair park resources and values. The rule requires that most recreational snowmobiles and snowcoaches operating in the parks meet certain air and sound emissions requirements, that snowmobilers and snowcoach riders in Yellowstone be accompanied by a commercial guide, and sets daily entry limits on the numbers of snowmobiles and snowcoaches that may enter the parks. Traveling off designated oversnow routes will remain prohibited. The FEIS, ROD, and other documents pertaining to winter use management in the parks can be found at http://www.nps.gov/yell/planyourvisit/ winteruse.htm.