On Saturday, October 26, at approximately 4 p.m., southbound Route 110 will be closed from Washington Boulevard to Route 1 and will reopen on Sunday, October 27, at 5 p.m.

The following road closures will occur in Arlington County on race day:

From around 3 a.m. to 6 p.m

• Fort Myer Drive, from Langston Boulevard east to N. Meade Street
• N. Lynn Street, from 19th Street N. to N. Meade Street
• N. Moore Street, from 19th Street N. to Wilson Boulevard
• Wilson Boulevard, from N. Oak Street to southbound Route 110
• 17th Street N., from Clarendon Boulevard to N. Lynn Street
• Northbound lanes of N. Oak Street, from Wilson Boulevard to 18th Street N.
• N. Oak Street, from Clarendon Boulevard to 17th Street N.
• N. Nash Street, from Wilson Boulevard to 17th Street N.
• N. Kent Street, from 1691 N. Kent Street to Wilson Boulevard
• Fairfax Drive, from N. Pierce Street to Fort Myer Drive
• N. Meade Street, from Fairfax Drive to N. Marshall Drive
• N. Marshall Drive, from N. Meade Street to Route 110
• Richmond Highway from I-66 to the 1200 block of Richmond Highway
• Route 110 southbound from I-66 to Washington Boulevard
• Route 110 north from Route 1 to I-66/Wilson Boulevard
• S. Fern Street, from 12th Street S. to Rotary Road
• S. Eads Street, from 12th Street S. to Rotary Road
• Army Navy Drive, from S. Hayes Street to 12th Street S.
• Washington Boulevard, divided from Route 27/Northbound I-395 to George Washington Parkway/Boundary Channel
• I-395 South, Exit 8B, ramp to Route 110 North
• On-ramp to I-395 North into the hot lanes of I-395 North
• I-395 South HOT lanes at Route 1
• I-395 North HOT Lanes at Seminary Road
• I-395 North Exit 8B to Pentagon/Route 27
• I-395 South Exit 8A to Pentagon South Parking
• Eastbound Washington Boulevard ramp to eastbound Route 27

From around 6 a.m. to 11 a.m

• 19th Street N., from N. Lynn Street to Fort Myer Drive
• N. Nash Street from Key Boulevard to Fort Myer Drive
• Fort Myer Drive, from Key Bridge to westbound Langston Boulevard
• Fort Myer Drive, from 19th Street N. to Langston Boulevard
• N. Moore Street, from 19th Street N. to Langston Boulevard
• Langston Boulevard (eastbound lanes only), from N. Lynn Street to N. Kirkwood Road
• Spout Run Parkway (westbound lanes only), from Langston Boulevard to George Washington Parkway
• N. Lorcom Lane, from N. Edgewood Street to Spout Run Parkway
• N. Lynn Street, from 19th Street N. to Key Bridge
• N. Rhodes Street, from Key Boulevard to Langston Boulevard eastbound
• N. Veitch Street, from 19th Street N. to Langston Boulevard eastbound

From about 6 a.m. to noon

• Westbound 15th Street S., from S. Eads Street to S. Bell Street
• On-ramp from southbound Richmond Highway to 15th Street S.
• Northbound Richmond Highway ramp to 15th Street S.
• On-ramp to northbound Richmond Highway from 15th Street S.
• Richmond Highway southbound, from I-395 southbound to the 1200 block of Richmond Highway

From approximately 6 a.m. to 5 p.m

• Fort Myer Drive, from Key Bridge to Langston Boulevard eastbound
• N. Nash Street, from Langston Boulevard westbound to Langston Boulevard eastbound
• N. Moore Street from Langston Boulevard to 19th Street N.
• Long Bridge Drive, from Boundary Drive to 12th Street S.
• 6th Street S., from Long Bridge Drive to S. Ball Street
• S. Ball Street, from 6th Street S. to 10th Street S.
• 10th Street S., from Long Bridge Drive to S. Ball Street
• 12th Street S., from S. Eads Street to Crystal Drive
• Richmond Highway southbound from I-395 southbound to the 1200 block of Richmond Highway
• Crystal Drive, from 12th Street S. to 23rd Street S.
• 15th Street S., from S. Bell Street to Crystal Drive
• 18th Street S., from S. Bell Street to Crystal Drive
• 20th Street S., from S. Bell Street to Crystal Drive
• I-395 North Exit 10A to Boundary Channel Drive
• I-395 south exit 10A to Boundary Channel Drive
• I-395 South, Exit 9 to Clark Street

In DC, the following streets will be closed:

From 3:45 a.m. to 2:00 p.m

• Jefferson Drive SW from 3rd Street SW to 15th Street SW
• 7th Street NW from Constitution Avenue NW to Independence Avenue SW
• Madison Drive NW from 3rd Street NW to 15th St NW
• 4th Street NW from Constitution Avenue NW to Independence Avenue NW

From 5:30 a.m. to 10:00 a.m

• Foxhall Road NW from MacArthur Boulevard NW to Canal Road NW
• Clark Place NW from Q Street NW to Canal Road NW
• Reservoir Road NW from MacArthur Boulevard NW to Canal Road NW
• Arizona Avenue NW from Carolina Place NW to Canal Road NW
• Georgetown Canal Road entrance
• Canal Road NW from M St NW to Chain Bridge Drive

From 5:30 a.m. to 10:30 a.m

• Francis Scott Key Bridge (all lanes)
• M Street NW from Canal Road NW to Wisconsin Avenue NW
• 35th Street NW from Prospect Place NW to M Street NW
• 34th Street NW from Prospect Place NW to Cady's Alley
• Bank Alley from Prospect Place NW to M Street NW
• 33rd Street NW from Prospect Place NW to C&O Canal
• Potomac Street NW from Prospect Place NW to M Street NW
• Wisconsin Avenue from M Street NW to K Street NW
• Grace Street NW from Wisconsin Avenue NW to 33rd Street NW

From 5:30 a.m. to 11:00 a.m

• 31st Street NW from Washington Harbor to South Street NW
• 30th Street NW from Washington Harbor to M Street NW
• 29th Street NW from K Street NW to M Street NW
• Whitehurst Freeway from M Street NW to K Street NW
• K Street NW from 34th Street NW to 25th Street NW
• 27th Street NW from K Street NW to I Street NW
• I Street NW from 27th Street NW to Virginia Ave NW

From 5:30 a.m. to 11:30 a.m

• Waterside Drive NW from Massachusetts Avenue NW to Rock Creek Parkway and Potomac Parkway NW

From 5:30 a.m. to 11:45 a.m

• Rock Creek and Potomac Parkway NW (northbound) to Beach Drive
• Rock Creek and Potomac Parkway NW (southbound) from Shoreham Drive NW
• Shoreham Drive NW (southbound) from Calvert Street to Rock Creek Parkway and Potomac Parkway NW
• Beach Drive NW from Rock Creek and Potomac Parkway NW to Calvert Street
• Virginia Avenue NW from New Hampshire Ave NW to Rock Creek Parkway and Potomac Parkway NW

From 5:30 a.m. to 12:00 p.m

• F Street NW from New Hampshire Ave NW to Rock Creek Parkway and Potomac Parkway NW
• 25th Street NW from F Street NW to Rock Creek Parkway and Potomac Parkway NW
• Rock Creek Parkway and Potomac Parkway NW from Beach and Shoreham Drives NW to Ohio Drive
• Parkway Drive from Rock Creek Parkway to Lincoln Circle is closed

From 5:30 a.m. to 12:30 p.m

• Independence Avenue SW from Maine Avenue SW to Ohio Drive

From 5:30 a.m. to 12:45 p.m

• East Basin Drive from Maine Ave SW to Ohio Drive SW
• Buckeye Drive runs from I-395 to Ohio Drive SW

From 5:30 a.m. to 1:00 p.m

• 1st Street from Constitution Ave NW to Independence Ave SW
• Pennsylvania Avenue NW from 3rd Street NW to 1st Street NW
• Maryland Avenue SW from 1st Street SW to 3rd Street SW
• Lincoln Circle from 23rd Street NW to 23rd Street SW
• West Basin Drive from Independence Ave SW to Ohio Drive SW
• 17th Street from WWII Memorial to Independence Ave SW
• Ohio Drive SW from East Basin Drive SW to 23rd Street NW

From 5:30 a.m. to 1:15 p.m

• Independence Avenue from 15th Street SW to 23rd Street SW
• Maine Avenue SW from East Basin Drive to Independence Avenue SW

From 5:30 a.m. to 2:00 p.m

• 15th Street from Constitution Ave NW to Maine Avenue SW
• Independence Avenue from 4th Street SW to 15th Street SW
• 12th Street SW from Independence AVE SW to Jefferson Drive SW
• 12th Street NW from Madison Drive NW to Constitution Ave NW
• 14th Street NW/SW from Constitution Ave NW to I-395

There will be an increased police presence in Arlington and they are urging drivers to watch for closures and be aware of increased pedestrian traffic.

Motorists should be on the lookout for temporary “No Parking” signs, Arlington police said in a statement. Illegally parked vehicles will be ticketed or towed.

Race organizers have encouraged runners and spectators to take public transportation to avoid road closures.

According to WMATA, the subway will open early at 5 a.m. Sunday and there is no planned track work to slow the trains' movement of runners.

Taking the subway costs a flat rate of $2.50 one way.

The closest subway station to the start line is Pentagon Station, which can be used on the Blue and Yellow lines. To avoid the crowds, get off at Pentagon City instead.

The Arlington Cemetery station is closed until 8:30 a.m

Trains will run on their normal weekend schedule.

Some Metrobus routes will be rerouted to Pentagon City on Saturday and Sunday to accommodate the race and related events.

The following Metrobus routes are affected on weekends: 7A, 10A, 16A, 16C, 16E, 22A.

On Sunday, all Metrobus service will move from the Rosslyn bus station to North Oak Street in between Wilson Boulevard and North 18thThStreet.

These routes will be rerouted on Sunday: 4B, 7A, 10A, 22A, 23A, 23B, 16A, 16C, 16E, 38B, 32, 36 42, 43, 52, 64, 70, 74, 79, D6, MW1, P6, S2.

Here are some locations where MCM recommended that spectators gather to watch the race:

• MCM Start Line on Route 110 in Arlington – get there by subway at Rosslyn or Pentagon stations
• Lincoln Memorial in DC to see runners from miles 10 to 16 – get there by running on Arlington Memorial Drive
• Visit the National Mall in DC to see runners from miles 11 to 19. Get there by heading east on Independence Avenue past the Washington Monument
• Finish line at the Marine Corps War Memorial in Arlington – get there by subway to Rosslyn or MCM shuttle from 23rd Street

If you can't manage to cheer on a runner in person, you can track their progress online in real time.

There is an interactive map of the course on the MCM website.

The race begins and ends in Arlington County, Virginia. Runners run through Rosslyn and the county, including the National Mall. The 20-mile journey ends at the Marine Corps War Memorial.