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.

The following streets will be closed to vehicle traffic for 24 hours, from Friday at 6 p.m. until 6 p.m. Saturday:

• Pennsylvania Avenue from 3rd Street to 7th Street, NW
• Constitution Avenue from 3rd Street to 7th Street, NW
• Maryland Avenue from Independence Avenue to 3rd Street, SW
• 3rd Street from Constitution Avenue, NW to Independence Avenue, SW
• 4th Street from Madison Drive to Pennsylvania Avenue, NW
• 6th Street from Indiana Avenue to Constitution Avenue, NW

The following streets will be closed to vehicle traffic on Saturday from 3 a.m. to 12 p.m.:

• Constitution Avenue from 9th Street to 15th Street, NW
• 10th Street from Pennsylvania Avenue to Constitution Avenue, NW

The following streets will be closed to vehicle traffic on Saturday, from 6 a.m. to 2 p.m.

• Constitution Avenue from 15th Street 23rd Street, NW
• 18th Street from Constitution Avenue to E Street, NW
• E Street from 18th Street to 19th Street, NW
• 19th Street from E Street to Constitution Avenue, NW
• Calvert Street from 24th Street to Columbia Road, NW
• Columbia Road from 18th Street to 16th Street, NW
• Harvard Street from 16th Street to 5th Street, NW
• 5th Street from Harvard Street to Bryant Street, NW
• Bryant Street from 4th Street to North Capitol Street, NW
• North Capitol Street from Bryant Street to K Street, NW
• K Street from North Capitol Street to 5th Street, NW
• 4th Street from K Street to E Street, NW
• E Street from 4th Street to 6th Street, NW
• 6th Street from E Street to Indiana Avenue, NW

“Emergency No Parking” signs will be posted for many of these streets as well, starting at 6 p.m. Friday through 6 p.m. Saturday.

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The Rock n’ Roll Marathon has been an annual D.C. tradition dating back at least nine years and was run in 2021 and 2022.