01970.jpg
Snowmobiles & Old Faithful geyser in winter;
William S Keller;
1970
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01978.jpg
Looking down at snow machines, people & Old Faithful erupting in the winter;
Photographer unknown;
No date
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09878.jpg
Snowmobile tour at the Grand Canyon of the Yellowstone;
Photographer unknown;
1978
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10335.jpg
Visitors at Old Faithful in the winter on Washington's birthday;
Frank Balthis;
1978
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10342.jpg
Snowshoe tracks in Upper Geyser Basin in the winter;
F Hirschman;
1978
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10346.jpg
Child on snowmobile at Canyon in the winter;
Frank Balthis;
1978
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10351.jpg
Skier watching elk in the Upper Geyser Basin;
Frank Balthis;
1978
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10362.jpg
Bison blocking snowmobiles on road;
Ron Shade;
February 1980
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10363.jpg
Bison blocking road in winter;
Ron Shade;
1980
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13737.jpg
Snowmobiles lined up for gas at Canyon YPSS (Yellowstone Park Service Stations) in the winter;
R Robinson;
1956
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14229.jpg
Snowmobiles on road with bison at Elk Park in the winter;
Jim Peaco;
February 1992
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14654.jpg
Line of snowmobiles waiting at West entrance in the winter;
Sam & Mary Cissel;
February 1992
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14661.jpg
Gardiner school children learning to cross country ski at Terrace Drive in the winter;
Jim Peaco;
February 1992
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15479.jpg
Snowmobiles passing bison near Roaring Mtn.;
Jim Peaco;
March 1997
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15480.jpg
Snow Coach passing bison on south rim drive - Canyon;
Jim Peaco;
March 1997
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15690.jpg
Snowmobile passing bison south of Obsidian Cliff;
Jim Peaco;
March 1997
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15710.jpg
Snowmobiles lined up at West entrance in the winter;
Jim Peaco;
March 1998
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15713.jpg
Private snowcoach on West entrance road in the winter;
Jim Peaco;
March 1998
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15766.jpg
Snowmobiles on West Entrance road;
Jim Peaco;
March 1998
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15768.jpg
Snowmobiles on Madison/West entrance road in the winter;
Jim Peaco;
March 1998
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