A wave of runners start the race north on Columbus Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)Runners fill the starting corrals of the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)Members of the media wait on the BP bridge for the start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)The pro marathon runners, first to start, run north on Columbus Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)The pro marathon runners, first to start, run north on Columbus Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)A runner flexes as he begins the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)The first wave of wheelchair racers begin the trek north on Columbus Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)Runners listen to the national anthem before the start of the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)Destiny Kocurek, center, along with her mother Kimberly and fiancee Askia Muhammed, wait in the predawn darkness for the start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)A runner salutes the crowd of onlookers as he begins the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)Racers head under Randolph Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)A runner waves as he begins the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)A wave of runners start the race north on Columbus Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)A wave of runners start the race north on Columbus Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)Racers pass under the BP pedestrian bridge on Columbus Drive to start the Chicago Marathon on Sunday, Oct. 11, 2026. (Arthur Maiorella/baiduhai)