Hagerstown Valley
The valley is bounded on the south by the Potomac River and on the north by the drainage divide between Conococheague Creek , which flows south to the Potomac River , and Conodoguinet Creek , which flows northeast to the Susquehanna River . 
<triplet> Potomac River <subj> Conococheague Creek <obj> tributary <triplet> Conococheague Creek <subj> Potomac River <obj> mouth of the watercourse