Trout Run is an 18.5adj=midNaNadj=mid[1] tributary of the Cacapon River, belonging to the Potomac River and Chesapeake Bay watersheds. The stream is located in Hardy County in West Virginia's Eastern Panhandle. Trout Run rises between Devils Hole Mountain and Great North Mountain near the Virginia state line in the George Washington National Forest. The stream empties into the Cacapon River at Wardensville.
Tributary streams are listed in order from south (source) to north (mouth).