It’s bad for traffic but it’s great for spectators watching one of the world’s great sporting events. I got this info off of the IMG Marathon Website.

Most streets and bridges along the marathon route will be completely closed to traffic during the race.

Plan your travel—and have your friends and family plan theirs—accordingly.

The following closing times are among those planned for Sunday, November 4. These times are subject to change.

Verrazano-Narrows Bridge, Staten Island-Brooklyn

Upper level (both directions): closed 12:01 a.m.-12:30 p.m.
Lower level, Staten Island-bound side: closed 7:00 a.m.-Noon.
Lower level, Brooklyn-bound side: closed 8:00 a.m.-11:00 a.m.
Please note that the bridge allows vehicular traffic only. No spectators or pedestrians (other than marathoners) are allowed on the bridge.

Fourth Avenue, Brooklyn
Closed 8:15 a.m.-1:00 p.m.

Pulaski Bridge, Brooklyn – Queens
Closed 9:00 a.m.-2:50 p.m.

Queensboro/59th Street Bridge, Queens – Manhattan
Lower level: closed 8:00 a.m.-3:30 p.m.
Upper level will remain open

First Avenue, Manhattan, 59th Street – 125th Street
Closed 9:15 a.m.-4:00 p.m.

Willis Avenue Bridge, Bronx – Manhattan
Closed 5:00 a.m.-4:45 p.m.

Madison Avenue Bridge, Bronx – Manhattan
Closed 8:00 a.m.-4:45 p.m.

Fifth Avenue, Manhattan
Closed 9:30 a.m.-5:15 p.m.

Central Park Transverse
79th Street Transverse: Closed to motor vehicles all day. Open to pedestrians.
86th Street Transverse: Closed to motor vehicles all day. Open to pedestrians.

East/West motor vehicle traffic will be detoured south to 57th Street or north to 138th Street.