Enter Yellowstone National Park through the North Entrance in Gardiner, Montana. Travel through Mammoth and then head towards the Tower/Roosevelt Junction. This bison was one of a small herd of bulls feeding in the snow near the Tower/Roosevelt Junction.
Yellowstone Park has had quite a bit of snow this year, which makes just "surviving" very difficult for the the Park's wildlife residents. This bull bison was having a tough time trudging through the deep snow in early January. More snow is expected, so things won't be getting any easier for him until spring.