The final rule implementing the Record of Decision on a long-term plan to guide management of winter use in Yellowstone and Grand Teton National Parks and the John D. Rockefeller, Jr. Memorial Parkway was published in
the Federal Register today.

The rule becomes effective on Wednesday, December 19, 2007, allowing the
parks to open for the winter 2007-2008 season on that day as scheduled.

The rule calls for changes in winter use in the parks beginning with the
2008-2009 winter season. The rule calls for operations to continue this
winter essentially as they have the past three winters.

Starting with the winter of 2008-2009, five hundred forty (540) Best
Available Technology (BAT) snowmobiles and eighty-three (83) snowcoaches will be allowed per day in Yellowstone. All snowmobiles and snowcoaches will continue to be 100% commercially guided. The rule continues to require that snowmobiles and snowcoaches travel only on existing park roads groomed for their use. Trail and off-road use of snowmobiles and snowcoaches has always been, and will continue to be, prohibited.

In Grand Teton and the Parkway, grooming and motorized oversnow travel on the Continental Divide Snowmobile Trail (CDST) between Moran Junction and Flagg Ranch will be discontinued. Twenty-five (25) snowmobiles a day will be allowed to travel on the Grassy Lake Road, with no BAT or guiding
requirement. Forty (40) unguided, BAT snowmobiles a day will be allowed on
Jackson Lake to facilitate ice fishing by those possessing appropriate fishing gear and a valid State of Wyoming fishing license.

Beginning with the 2008-2009 winter season, the rule provides for snowmobile and snowcoach travel over Sylvan Pass when full avalanche
forecasting, as defined in the Operational Risk Management Assessment,
indicates travel through the pass is safe. The pass will be closed to all
travel when such forecasting shows travel is unsafe, and will reopen to
travel only when forecasting indicates the danger has subsided. However,
the National Park Service will work with the State of Wyoming, Park County,
Wyoming, and the City of Cody to seek a consensus approach to avalanche
mitigation by June 1, 2008, to provide alternate ways for safe motorized oversnow access over Sylvan Pass.

Beginning with the 2011-2012 season, all snowcoaches operating in the
parks will be required to meet emission and sound level requirements. These
requirements, like those for snowmobiles, are intended to further improve
air quality and soundscape protection.

In Yellowstone this winter (2007-2008), up to 720 commercially guided Best
Available Technology (BAT) snowmobiles a day will be allowed to enter the
park.

The rule calls for Sylvan Pass to remain open to motorized oversnow
travel. Yellowstone will use a combined helicopter and howitzer program to conduct avalanche hazard mitigation operations this winter. Methods used to reduce the risk of avalanche hazard mitigation this winter may result in longer temporary closures between the detection of avalanche risk and the
reopening of Sylvan Pass to motorized oversnow travel compared to historic
avalanche hazard mitigation operations.

In Grand Teton and the Parkway, 140 snowmobiles a day will be allowed this
winter. Most of the snowmobiles will have to meet BAT requirements.
Access to the Continental Divide Snowmobile Trail, Grassy Lake Road, Jackson Lake, and adjacent public and private lands will continue like
they have the past three winters.

The Final Rule implementing the Record of Decision can be found on the web
athttp://a257.g.akamaitech.net/7/257/2422/01jan20071800/edocket.access.gpo.gov/2007/pdf/E7-24175.pdf.

The Record of Decision and the Winter Use Plans Final Environmental Impact
Statement can be found at the National Park Service’s Planning,
Environment and Public Comment (PEPC) website at
http://parkplanning.nps.gov/documentsList.cfm?parkId=111&projectId=12047.