It snowed again, so I found some other tracks, and also think that the fox is living under my next door neighbor's house. I will attempt to live trap it, and haul it off to the country before it gets trapped, and euthanized.
I assume that these are from a squirrel hopping a long distance. We have hundreds of squirrels here since my squirrel trapping neighbor moved. He would carry off several hundred every year because of their destructive behavior. He did not have the heart to kill them, although he was willing to relocate them in someone else's backyard.