Willoughby Run
Willoughby Run is a tributary of Marsh Creek in Adams County , Pennsylvania in the United States . 
<triplet> Willoughby Run <subj> Marsh Creek <obj> mouth of the watercourse <subj> Pennsylvania <obj> located in the administrative territorial entity <triplet> Marsh Creek <subj> Willoughby Run <obj> tributary <subj> tributary <obj> instance of <triplet> Adams County <subj> Pennsylvania <obj> located in the administrative territorial entity <subj> United States <obj> country <triplet> Pennsylvania <subj> Adams County <obj> contains administrative territorial entity <subj> United States <obj> country <triplet> United States <subj> Pennsylvania <obj> contains administrative territorial entity