We demonstrate that single Cu atoms can be pulled in single hops across stepped and flat Cu surfaces at low temperatures using a scanning tunneling microscope. By recording the tip height at constant current during manipulation the hopping length and the position of the tip apex relative to the substrate lattice, at which a hop is induced, can be measured. By this way it is possible to resolve that a Cu atom moves during manipulation on Cu(lll) along [1 (1) over bar 0]-depending on the chosen gap resistance-either by long hops from one fee adsite to the next or by shea hops while intermediately occupying hcp sites. On the "stepped" Cu(211)-surface hops between adjacent fivefold adsites can be observed during manipulation along [0 (1) over bar 1].