Metrorail will open two hours early for Sunday for the Marine Corps Marathon.
The system will open at 5 a.m., although the Arlington Cemetery Station won't open until 8:30 a.m., after the marathon is underway. WMATA says that station should only be used to access the finish area or to leave the event after the race.
Runners and spectators should use the Pentagon Station to access the start line.
To accommodate an expected surge in riders, Metro will run extra Blue Line trains between Franconia-Springfield and Stadium-Armory between 5 a.m. and 8:15 a.m., and again between 11:30 a.m. and 4:30 p.m.
WMATA is also reminding riders to use their SmarTrip cards to get through the turnstiles faster, and to make sure the cards are loaded with enough money for a round trip to avoid lines at farecard machines.
Two Virginia bus terminals will be closed for much of the day Sunday: The Pentagon Bus Terminal will be closed from 4 a.m. until about 4 p.m., during which Pentagon Metrobus service will be relocated to the Pentagon City Station. In addition, the Rosslyn Bus Terminal will be closed from 4 a.m. until about 6 p.m. During this time, all Metrobus service will be relocated to Oak Street.