Wait for the most popular attraction in Yellowstone to blow every 1.5-2 hours. The National Park Service even has a Live Webcam.
If you enter the park from the North Entrance, you'll see this beauty of a mountain covered in snow to the north.
From a distance you can watch the steam rise around the Mammoth Hot Springs area. You might catch a glimpse of a meandering elk as well.
From 10,243 feet you can overlook Tower Junction and Canyon Village.
Overlooking a snow covered Yellowstone Lake.