Well, that's no fun. On the other hand, that bit of countryside from Key Bridge up to Great Falls is about as pretty as it gets. You have to get off the road to see it, but that stretch of the Potomac River and all the ravines and woods running down to it are Virginia at her best, IMHO. It's got too many people, but it's possible to find some quiet places here and there. As I recall, you are new to Northern Virginia. If you haven't made it to Great Falls yet, you need to do it. The entire Shenandoah Valley, parts of Maryland, and a huge chunk of West Virginia all drain through that narrow gorge. It makes for some spectacular scenery.