Here Are The Road Closures For Saturday's Rock 'N' Roll Half Marathon
https://dcist.com/story/23/03/15/road-closures-rock-n-roll-half-marathon/
The Rock n Roll Half Marathon and 5K is set to close a number of roads in downtown D.C. starting Friday evening and into Saturday night.
The race will begin at 8 a.m. Saturday near Constitution Avenue NW and 14th Street SW on the National Mall.
Runners will proceed on a course that loops around the city. This includes going west across the Memorial Bridge, proceeding north all the way to Harvard Street NW, going past the McMillan Reservoir, and then moving south down North Capitol Street NW before ending outside of the U.S. Capitol.
In all, the half marathon will cover just over 13 miles. The 5K will start near the U.S. Capitol, and proceed north to N Street NE before coming back to the Capitol grounds.
Because of these races, D.C. police have announced a slew of road closures with some starting as early as Friday at 6 p.m.
I would avoid driving downtown this Saturday. Metro is best.