News Rider Injured after Motorcycle Spooks Horse at Manassas National Battlefield Park By Potomac Local News Published September 5, 2013 at 10:30AM | Updated September 5, 2013 at 11:49AM A sign warning drivers of a horse crossing is posted along busy Va. 234 inside Manassas National Battlefield Park. [Uriah Kiser / Potomac Local News] This article is FREE to read. Please Sign In or Create a FREE Account. Thank you. Author Potomac Local News View all posts #News