We took a trip out to western Loudoun to visit a few stops on the wine trail. It was so much fun! We stopped at a few wineries just to see the views and then did tastings at two of them. The first, Bluemont Vineyards, is the highest vineyard in Loudoun (around 950 feet above sea-level) and was beautiful. We were told that on really clear days you can see the Washington Monument from the mountain (although it was relatively clear and we couldn't see it).
The second winery, Breaux Vineyards, didn't have quite the views that the first offered, but was also gorgeous. It was much more established than the first with over 14 available wines to taste, and well worth a second trip out there sometime soon. Let me know if you'd like to go!