Mud run is a creek flowing thru the agricultural countryside of Mad River Township in southern Clark Co. Ohio. It flows eventually into the Mad River near Fairborn, Ohio, which flows to the Great Miami river in Dayton, Ohio, which flows into the Ohio river just west of Cincinnati, Ohio. The cache is a microtube that replaced original cache that walked off. Bring a writing implement. There is a pull off area right at this area, but please be careful when pulling out & look for traffic coming from the north.