I am new to the forum, and have a two year old English Setter, for about 6 weeks now. We run on dirt roads, about 8 miles per run so far. I tie his long webbing lead (15 feet or so) around my waist, because holding it is a pain. I also use a collar because I am concerned about chafing with a harness (also he pulls still, and I want him to be responsive). I have few cars to deal with, but when I do, I do pull in the lead to keep him close to me... the one drawback, but it is seldom. He loves running.