Is this a joke?
http://www.allsportsgp.com/corp.htm
All Sports Grand Prix, Dulles, VA
(Never been, just found googling...)
google is your friend.
The mall out front the capitol is a great spot. You can either run the walks or off road thru the greens.
The best times are when the lefties are staging a protest as you can use them for slalom cones. Extra points for every cone you can hit.