Hey buck, where did you find the track? Sometimes tracks left in the mud appear a little bigger than they really are, but if you found it someplace else it might be right on. Anyways, a 4 inch track is a decent track. From my experience, a 4 inch track is generally a 2.5 year old deer or younger. Could be a 2.5 year old buck and be a nice one at that. BEST of luck to you.