15771.jpg 
 
Snowmobiles lined up at West entrance in the winter;
Jim Peaco;
March 1998 
 
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15873.jpg 
 
Snowmobiles on Madison/West entrance road in the winter;
Jim Peaco;
March 1998 
 
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16111.jpg 
 
Cross country skiing in the Upper Geyser Basin in the winter;
Jim Peaco;
February 1999 
 
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16273.jpg 
 
Visitors at Old Faithful Snowlodge;
Jim Peaco;
February 2000 
 
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16275.jpg 
 
Snowmobiles at the South Entrance;
Jim Peaco;
February 2000 
 
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16276.jpg 
 
Visitors at Moose Falls parking lot;
Jim Peaco;
February 2000 
 
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16282.jpg 
 
Snowcoaches at Snow Lodge in the winter;
Jim Peaco;
February 2000 
 
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16392.jpg 
 
Cross country skiers on Lone Star trail in the winter;
Jim Peaco;
March 2000 
 
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16396.jpg 
 
Cross country skier on Lone Star trail along the Firehole River in the winter;
Jim Peaco;
March 2000 
 
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16399.jpg 
 
Cross country skiers on Lone Star trail along the Firehole River in the winter;
Jim Peaco;
March 2000 
 
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16402.jpg 
 
Yellowstone Institute Wonderland tour at Lone Star trailhead in the winter;
Jim Peaco;
2000 
 
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16411.jpg 
 
Snowmobiles & exhaust at West entrance in the winter on Presidents Day weekend;
Jim Peaco;
March 2000 
 
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16413.jpg 
 
Snowmobiles & exhaust in the winter at the West entrance road on Presidents Day weekend;
Jim Peaco;
March 2000 
 
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16416.jpg 
 
Snowmobiles passing bison in the winter on West entrance road on Presidents Day weekend;
Jim Peaco;
March 2000 
 
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18011d .jpg 
 
Bombardier entering Yellowstone in the winter at the West entrance;
Jim Peaco;
December 17, 2003 
 
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18012d .jpg 
 
Mattrack entering Yellowstone in the winter at the West entrance;
Jim Peaco;
December 17, 2003 
 
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18013d .jpg 
 
Four stroke snowmobile in the winter;
Jim Peaco;
December 17, 2003 
 
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18014d .jpg 
 
Snowmobile guide with group in the winter at the West entrance;
Jim Peaco;
December 17, 2003 
 
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18015d .jpg 
 
Snowmobile guide in the winter at the West entrance;
Jim Peaco;
December 17, 2003 
 
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18107.jpg 
 
Skier on Sheepeater trail in the winter;
Jim Peaco;
February 2004 
 
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