Bank of America Chicago Marathon: Course, Route Profile & Map

Course & Elevation

The start is on Columbus Drive in Grant Park, skyline behind you and Lake Michigan to your right. The opening kilometres zig-zag through the Loop and cross the Chicago River three times before the course heads north through River North, Old Town and Lincoln Park. Around kilometre 13 comes Lakeview and Northalsted, the loudest block of support all day. Just short of Wrigleyville the route turns and runs back south on Broadway, Clark Street and the street canyon of LaSalle Street into the Loop, with halfway falling near the river again.

The second half is the quieter one. Adams Street and Jackson Boulevard carry the race dead straight west past Greektown, Little Italy and the United Center: wide roads, almost no shade, a much thinner crowd. From kilometre 30 the mood swings back: Pilsen turns out with mariachi, Chinatown with lion dancers and a near-180-degree turn at the Chinatown Gate. Then come the empty, attritional kilometres through Armour Square and Bronzeville before Michigan Avenue leads north again. In the final kilometre Roosevelt Road lifts over the rail lines, some eight metres of climb known locally as Mount Roosevelt, and a left onto Columbus Drive takes you to the line.

The profile explains the reputation: 94 percent of the loop is flat, total ascent comes to 46 metres, and there is not a single classified climb. It is run entirely on closed city asphalt lined by roughly 1.7 million spectators, with about 50,000 starters on a course staged for the 48th time in 2026.

Pacing Strategy

Nothing pays off in Chicago like even kilometre splits. There is no terrain reason to vary effort, so plan flat splits or a slightly negative split and do not budget for the rise at the end. The big trap is the first eight kilometres: narrow Loop streets, a dense field, the course's world-record reputation and a fractionally falling profile all invite a pace you pay for later on Michigan Avenue. On top of that, GPS reads reliably long between the skyscrapers, so pace off the mile and kilometre markers, not the watch face.

The race is decided from Chinatown onward. After kilometre 34 the course empties out, loses its shade and goes quiet, and the northbound run up Michigan Avenue is fully exposed to any wind coming off Lake Michigan, which costs minutes on an open road. Whoever still has something left here moves up. Roosevelt Road in the last kilometre is objectively trivial at eight metres, but it arrives exactly when nothing is left: run it on feel rather than pace, and save the kick for the flat run-in on Columbus Drive.

Training plan for Bank of America Chicago Marathon: 12-week build

For most age-group athletes the Bank of America Chicago Marathon means three and a half to five and a half hours on the road; the course limit is 6:30. The demand is about as uniform as a marathon course can make it: a continuous aerobic effort with no anaerobic spikes, because with 94 percent flat terrain and not one classified climb nothing breaks the rhythm. That is the challenge: not climbing strength, but the ability to hold a target pace for hours on hard asphalt.

The race is decided after kilometre 34. Between Chinatown, Armour Square and Bronzeville the crowds and the shade both disappear, and the way back up Michigan Avenue runs north across open, wind-exposed road. Train fatigue resistance for that specifically: long runs building to 30-35 km, with 8-15 km blocks at marathon race pace placed at the end of those long runs rather than at the start.

Conditions on the second Sunday in October come in two versions and both need preparing for. The normal case is a cool start in waves from 07:35, which means throwaway layers for the long wait in the corral. The exception is heat: in 2007 the organizer shut the course down mid-race at 31 °C, so a plan B with a reduced target pace and a drinking strategy across the 20 aid stations belongs in the preparation. Wind off the lake is the third factor, so put some long runs deliberately on open, exposed roads.

You do not need hill training for Chicago, with one exception: a few short 200-400 m rises tacked onto the end of long runs mean Roosevelt Road at kilometre 42 is not a surprise. What matters more is key sessions on asphalt so tendons and muscles tolerate the hard surface over the full distance, a gel and fluid routine rehearsed in training, and running by feel. GPS pace is unusable in the Loop's street canyons, and anyone who has only trained to the watch loses their rhythm there.