Special Regulations; Areas of the National Park System

This rule governs winter visitation and certain recreational use in Grand Teton National Park and the John D. Rockefeller, Jr. Memorial Parkway. 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 that these activities do not unacceptably impact or impair park resources and values. The rule requires that recreational snowmobiles operating on Jackson Lake meet certain air and sound emissions requirements, and that such snowmobile use is for the sole purpose of accessing ice fishing opportunities on the lake. The rule sets daily entry limits on the numbers of snowmobiles allowed on Jackson Lake and on the Grassy Lake Road, and also designates the route between Flagg Ranch and the South Entrance of Yellowstone National Park for snowmobile and snowcoach use, subject to compliance with the daily entry limits and other requirements set out in the separate rule authorizing snowmobile and snowcoach use in Yellowstone National Park. Traveling off designated oversnow routes will remain prohibited.