Weasels bound, so they make tracks that look like two little feet. But what really happens is they put their front feet down and then move their back feet into the same place where their front feet were as they bound forward.
My guess is this was a least weasel, because it was awfully small.
This weasel likely came through just before it started to snow yesterday, because its tracks are nearly filled in. There was a whole line of tracks just like these going from one side of the access road to the other.