The annual Marine Corps. Marathon is this Sunday. And that means certain road closures will be in effect in the morning hours.
Specifically, from about 5:30 AM until about 10:30 AM, Key Bridge, M St. west of Wisconsin, Wisconsin south of M St., and K St. east of Wisconsin will be closed to auto traffic. (Pedestrians can still cross throughout the closures). Rock Creek will also be closed (and for a bit longer than the Georgetown streets).
So if you need to get around by car on Sunday, keep this all in mind and plan ahead. This is particularly true for residents along Water St. No cars will be allowed in or out of this stretch until late morning, after the runners are all through.
The Georgetown Metropolitan 
Company flying out of DCA Sunday morning. Should be interesting. Thinking having them schedule an Uber the day before