Three miles. Over what sort of terrain? On a decent road, any adult in reasonable shape can walk that in an hour.
Same distance in deep snow, and I define that as being too deep to walk through comfortably without snow shoes, you might as well be on the moon.
Good discussion on this story here in
this thread.
_________________________
Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.
John Lubbock