Discovered at Community Celebration Event in Martinsburg, WV - GeoTrail Kickoff on West Virginia Day.
From the event page: "This event is celebrating several things. First we want to celebrate Geocaching's 20th anniversary. Second the Martinsburg-Berkeley County Convention and Visitors Bureau (CVB) will be kicking off their new GeoTrail, "Hidden Treasures", a new GeoTrail celebrating the county's 250th anniversary. And Lastly, what better day to launch a GeoTrail celebrating Berkeley County's 250th Anniversary than to do it on West Virginia Day. West Virginia Day is celebrated annually on June 20. The day celebrates the state's 1863 admission to the union as a result of the secession of several northwestern counties of Virginia during the American Civil War."