I think they are probably for the 3-2-1 Ride?
http://321ride.org/events/event/3-2-1-ride-pittsburgh/
2013-10-07 09:27:12
2
Route Arrows on GAP from Hot Metal Bridge through McKeesport?
Does anybody know about the route arrows (RouteArrows.com) along the GAP from the Hot Metal Bridge through McKeesport? What event where they marking? TIA, V.
2013-10-06 17:34:55