I know they used to hold a bunch out at Fort Dupont which is a great flat and fast course. However, checking the runwashington site, I only found one on 10/22 which was cancelled. I am trying to find one at this park or another flat/fast locale from 10/15-11/6 if anyone from DC has some ideas. They have a few 10K's, it seems, but I'm trying to find just a 5,000 and am surprised that there don't seem to be any at this location.