Near Lorton off of Rt. #123...

Technical, with some vicious hills. Only about 7 miles per lap, but 1 lap there feels almost like 20 miles tooling around Wakefield/Accotink...

http://www.nvrpa.org/park/fountainhead
http://en.wikipedia.org/wiki/Fountainhead_Regional_Park
http://www.singletracks.com/bike-tra...onal-park.html