Business New Dumfries McDonalds Opens Friday By Potomac Local News Published August 30, 2012 at 9:55AM | Updated September 4, 2012 at 8:52AM A new McDonalds restaurant in Trinagle Shopping Plaza in Dumfries will open Aug. 31, 2012. (Submitted) This article is FREE to read. Please Sign In or Create a FREE Account. Thank you. Author Potomac Local News View all posts #Dumfries