up and down (something)
All over or across something or some place; the length and breadth of something or some place. The recession brought people up and down the country into severe financial constraints. I searched up and down the street, but I can't find my keys anywhere. I don't know where else I could have dropped them, though.
up and down something
all over something; everywhere in a place: People up and down the country are giving money to the earthquake appeal.