Special Regulations; Areas of the National Park System

This rule governs winter visitation and certain recreational use in Yellowstone National Park for the 2009-2010 and 2010-2011 seasons. This final rule is issued to implement the Finding of No Significant Impact (FONSI) for the 2008 Winter Use Plans Environmental Assessment (2008 EA) approved October 15, 2009, and will provide visitors a range of winter recreation opportunities that are appropriate to the national park setting and do not unacceptably impact or impair park resources or values. The rule requires that most recreational snowmobiles operating in the park meet certain NPS air and sound emissions requirements, requires 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 park. Traveling off designated oversnow routes will remain prohibited.