Business U.S. Highway 2 ( Bus . US 2 ) is a 1 @.@ 270 @-@ mile ( 2 @.@ 044 km ) business route that runs from the Wisconsin state line at the Montreal River . The route extends through downtown Ironwood on Silver and Aurora streets before turning northward along Suffolk Street . Bus . US 2 stays on Suffolk Street for a short while until it turns onto Frederick Street . On Frederick Street , Bus . US 2 bears north through a residential area along Douglas Street . The eastern terminus of the route is at its junction with US 2 at the corner of Cloverland Drive and Douglas Street north of downtown .