SAN FRANCISCO -- The 2018 San Francisco Marathon will be held Sunday and will conflict with the Giants' game vs. the Brewers at AT&T Park at 1:05 p.m. PT. A heavy traffic advisory is in effect throughout San Francisco from 6 a.m. to 2:45 p.m. PT.
Fans attending the game are advised of the following alternate routes to AT&T Park (a full list of detours can be found at thesfmarathon.com):
•Map of traffic detours for Sunday's Giants game
NB 280 Mariposa Street exit: Northbound vehicles taking the Mariposa Street exit will be directed westbound on Mariposa Street to southbound Pennsylvania, where they can take 18th Street or 20th Street westbound to northbound Third Street to Lot A or the ballpark by crossing the Third Street Bridge.
SB 280 Mariposa Street exit: Southbound vehicles taking the Mariposa Street exit will head southbound on Pennsylvania, where they can take 18th Street or 20th Street westbound to northbound Third Street to Lot A or the ballpark by crossing the Third Street bridge.
NB 280 Cesar Chavez exit: Northbound vehicles will go eastbound on Cesar Chavez and northbound on Indiana Street or Third Street to westbound 23rd Street and then Northbound on Indiana Street or Third Street to Westbound 23rd Street and then northbound on Pennsylvania. From here, vehicles will head westbound on 20th Street or 18th Street to northbound Third Street to Lot A or the ballpark by crossing the Third Street bridge.
SB 280 Cesar Chavez exit: Northbound vehicles will go northbound on Pennsylvania Street. Westbound vehicles will take 20th Street or 18th Street to northbound Third Street to Lot A or the ballpark by crossing the Third Street bridge.