from Bad Homburger Kreuz take A661 direction Bad Homburg, get off first exit towards Bad Homburg, than first exit right again. Turn left on the traffic light (Zeppelinstraße) up to Landratsamt. Behind the crossing, take next left into the „fields“ to Brauhaus Graf Zeppelin“.
There are several connections to the run. S-Bahn S5 might be the best.
From Bad Homburg train station it's a little walk up the hill.