In most American jurisdictions, yes, that's legal. The California stalking statute for example (Penal Code 646.9(a)) only applies if the person who's following

In most American jurisdictions, yes, that's legal. The California stalking statute for example (Penal Code 646.9(a)) only applies if the person who's following you intends to make you afraid for yourself or your family. This why stalking victims so often struggle to do anything about it.