From the DC Convention Center at 801 Mount Vernon Place NW:

Drive EAST on Mount Vernon Pl NW toward 7th St NW


Mount Vernon Pl NW becomes New York Avenue NW


Turn RIGHT onto I-395 South


Merge onto I-295 S via the exit on the left


Keep LEFT to take Southeast Freeway toward Pennsylvania Ave SE


Turn sharp RIGHT onto Fairlawn Avenue SE


Turn slight RIGHT onto Nicholson Street SE


Turn RIGHT onto Anacostia Drive SE


Drive along Anacostia Dr SE behind the skating rink, 
and park in the lots near the river.