Was thinking on top of a wall it could be squirrel tracks as they often use them as highways over rough ground but tracks a little too large. Unless that old snowmelt tracks getting bigger thing happened. No sign of tail drag?
Thank you people (even Goatboy ). How disappointing for it to be squirrel. I've never seen squirrel there, although there's no particular reason why they shouldn't be. I've never seen stoat there either, but they are more elusive.