Upper Geyser Basin in winter (Photographer: J. W. Stockert, 1972)
Old Faithful area in the winter (Photographer: Schultz, 1971)
Winter at Norris Geyser Basin (Photographer: Bryan Harry, 1965)
Trees above Lake Butte overlook in the winter (Photographer: Frank Walker, 1978)
Source: National Park Service
American bison, or buffaloes, cross the frozen Madison River in snowy Yellowstone National Park in the western U.S. state of Wyoming (Photographer: Carol M. Highsmith)