SafeTrack shouldn't be a problem, but see the late-night schedules for all Metrorail lines.
Metro will stay open late for any Capitals playoff game that is still going after 11 p.m.
Watch for crowding throughout the coming week on the streets near the Tidal Basin and on Metro as the cherry blossoms reach their predicted peak bloom.
Expect crowds in D.C. for Cherry Blossom Festival events, a Nationals exhibition on Friday and NCAA basketball on Saturday.
Metrorail will stay open late for the east regional playoffs Thursday night, thanks to a deal with Verizon Center.