On Oct. 9, for 26.2 miles through 29 neighborhoods, about 40,000 participants and about 1.7 million spectators will descend on the city for the Bank of America Chicago Marathon . Officials encourage the use of public transportation to get to the course, and transit agencies will beef up service. The route begins and ends in Grant Park, passing near Wrigleyville and Sox Park along the way. Streets for the course will be closed for most of the morning. See the map for when streets will reopen, on a rolling basis.

Mile markers Aid stations Click for approximate time roads will reopen