Not sandhill crane, their toes splay out more and the middle toe is longer than the two outside toes. Check Google for pictures of their tracks.
If it is near a beaver pond my best guess is that it is a beaver walking on it's hind legs, or perhaps it was walking on all fours and the front feet just aren't showing on harder snow. If the snow is a little harder the outside hind foot toes often would not show in the track. The back end of your closeup shot is consistent with the hind pad on the beaver hind foot. The size of the track is about right for an adult beaver hind foot.
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