A small herd of bison spent the night on a small rise near Old Faithful geyser where the snow was melted because of the thermal feature underground. The constant mist from the geysers covered the bison in frost as they huddled together.
Frosty cow bison
The bison began to rise along with sun to move to new ground.
Frost-covered yearling
A path was soon created as the herd moved into the valley.
Bull and cows plow through the snow
Soon much of the herd were heading in the valley along the tree line.
Winter line of bison, Yellowstone National Park, Wyoming
One mother and her calf, who insisted on milk, remained behind as the sun got higher in the sky behind the mist of Old Faithful.
Sunrise, Old Faithful Geyser