2026 Chicago Marathon - Oct 11

2026 Chicago Marathon - Oct 11 Countdown

-- DAYS
-- HRS
-- MIN
-- SEC

Want personality modes & weather integration? Try the full countdown experience

Registration closed · charity entry only View official registration →

Race Information

Race2026 Chicago Marathon - Oct 11
CityChicago
Date2026-10-11 at 07:30
Field Size~54,000 runners
Time Limit6 hours 30 min
TimezoneAmerica/Chicago
Official SiteChicago Event Management
RegistrationRegistration closed · charity entry only · Official Site

Race Day Weather

Average Temperature12°C / 54°F
Humidity65%
Wind18 km/h
Rain Chance25%
Typical ConditionsCool with strong Lake Michigan wind

What to Prepare: Despite the 'Windy City' name, this is an inland street course, not a lakefront run — the lake is only loosely parallel in the early miles. October is usually cool and dry, with a median ~52°F (11°C) start and a 15–20°F rise during the race. Westerly or northwesterly wind creates crosswinds on the north–south streets and a headwind around miles 13–15; a southerly flow gives a tailwind on the northbound opening and closing miles.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 18 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Course Profile

Course TypeLoop
Elevation Gain35m
TerrainRoad
ProfileA fast, flat loop through 29 Chicago neighborhoods, starting and finishing in Grant Park. Essentially zero net elevation change — among the flattest Major courses — broken only by the small Mount Roosevelt rise just before the line at mile 26.
Boston QualifierYes — Check your BQ time

Course Analysis

Course Overview

The Bank of America Chicago Marathon is one of the seven Abbott World Marathon Majors and one of the fastest courses on Earth. The 48th running falls on Sunday, October 11, 2026, with the first mass wave starting at 7:30 a.m. from Grant Park. It is a loop course — start and finish both in Grant Park — that travels through 29 Chicago neighborhoods over a mostly flat 26.2 miles, divided into a north, a west, and a south section before returning downtown.

This is the flattest-feeling Major. Net elevation change is roughly zero, making it the second-flattest Major after Berlin by most accounts. There is exactly one notable hill — the small bridge over Roosevelt Road, nicknamed 'Mount Roosevelt,' which arrives in the final half-mile near mile 26. Everything else is firm, flat city pavement.

The flatness shows up in the record book. Chicago has hosted multiple world records, and the women's marathon world record — Ruth Chepngetich's 2:09:56, set here in October 2024 — still stands as both the world and course record. The men's course record is Kelvin Kiptum's 2:00:35 from 2023. In 2025, American Conner Mantz ran 2:04:43 on this course to break a long-standing US men's record. If the weather cooperates, few places are faster.

The Loop, the Neighborhoods, and the GPS Canyon Trap

From Grant Park the course heads north through the Loop, River North, Old Town, Lincoln Park, and Lakeview/Boystown, then turns back south through Wells and Greektown into the West Loop, Little Italy and the UIC Medical District. It continues through Pilsen, Chinatown, Armour Square and Bronzeville, then up Michigan Avenue to the Grant Park finish. The early miles run roughly parallel to Lake Michigan but inland — despite the 'Windy City' reputation, this is a downtown and neighborhoods street course, not a lakefront run. The race was historically barred from the parks and the shoreline path, so you spend the day in the city's canyons and side streets, not on the waterfront.

Those canyons create the day's biggest pacing trap. Downtown skyscrapers block and reflect GPS signals, and the effect is worst in miles 1–5 and 24–26, exactly where you most want clean data. The result is that watches read long — many runners finish with 26.4 to 26.8 miles recorded, and reports put the GPS error in the first mile alone at roughly 0.4 miles. As one running magazine bluntly put it, most GPS watches are effectively useless by the first mile marker.

The defense is built into the course. A single blue line is painted along the entire route marking the certified tangents — the exact 26.2-mile racing line. Hold that line and trust the painted mile markers and your effort, not your watch's pace field. With roughly 25 turns (more than most marathons) and heavy crowding around the 90-degree corners, runners who drift wide of the tangents add real distance — which is the other reason watches show 26.5-plus at the finish.

The Lakefront-Wind Myth vs. Reality

Chicago's 'Windy City' name and the early lake-parallel miles make runners brace for a brutal lakefront gale. The reality is milder and more nuanced. Average race-day wind is about 6–10 mph, and because the course winds through downtown streets rather than along the open shoreline, you are sheltered for most of it. The most exposed stretch is the early northbound section near the lake; the rest is broken up by buildings.

Direction matters more than the name suggests. About 72% of years bring a westerly or southerly flow. West or northwest wind (roughly 39% of years) produces a crosswind on most of the north–south segments and a headwind around miles 13–15; a southerly or southwesterly flow (about 33%) hands you a tailwind on the northbound opening miles 1–8 and again on the closing miles 23–26.2. Either way, the wind rarely decides your race the way the nickname implies.

Temperature is the real variable. The October median start is about 52°F (11°C) with a typical 15–20°F rise during the race — cool, dry, and close to ideal. But Chicago is on average the warmest Major, and history is a warning: 2007 hit 88°F with high humidity and the race was halted at about 3.5 hours after heat casualties, while 2009 started near 33°F and ran fast in the cold. Recent editions (2023–2025) all ran cool, in the 45–68°F range. A cool October Sunday is one of the fastest marathon days anywhere; a warm one is punishing.

Chinatown to Mount Roosevelt (Mile 21–26.2)

The course's emotional climax sits at Chinatown, around mile 21, reached through an almost 180-degree turn at the Chinatown Gate. Lion and dragon dancers and drummers make it one of the loudest points on the route — and it lands almost exactly where many runners hit the wall. Earlier, Pilsen's mariachi bands around mile 19 and the Boystown party near miles 7–9 are the other marquee spectator zones, but Chinatown is the one that arrives when you need it most.

From there the route runs north through Bronzeville and the South Loop back toward downtown. The surface is 100% firm city pavement for the entire race — flat and fast, but unforgiving: on a dead-flat course the same muscle fibers fire over and over with no change in load, which can accelerate late-race fatigue more than rolling terrain. The miles feel relentless precisely because they never change.

The single hill comes at the very end. 'Mount Roosevelt' is the bridge over Roosevelt Road near mile 26 — about 25 feet of climb in the final half-mile, and on trashed legs it feels far bigger than it is. Crest it, turn left onto Columbus Drive, and a short downhill of a few hundred meters drops you to the finish line in Grant Park. After 26 flat miles, that little rise is the last thing standing between you and the medal.

Race Strategy and Entry Math

Pacing. Chicago rewards even, disciplined effort. The flatness is a gift and a trap: with no hills to force a rhythm change, it is easy to drift fast early and pay for it after mile 20. Ignore your watch's pace field in the downtown canyons — trust the blue tangent line, the painted mile markers, and feel. The free official Pace Team runs groups from 2:55 to 6:00, and locking onto a pacer removes the GPS guesswork entirely. Build your splits on the certified 26.2 with our Pace Calculator, and budget for a watch reading 26.4–26.8 at the line so the long final 'miles' don't rattle you.

Weather plan. Because temperature is the decisive variable, check the forecast in race week and adjust your goal. A cool, dry day is a green light to chase a PR on the world's flattest-feeling Major; a warm, humid one means easing your target rather than fighting it. Gauge race-morning conditions with our Weather Score Calculator. Note the cutoff: the course time limit is 6 hours 30 minutes, measured by net time from when you cross the start, at roughly a 15-minute-per-mile pace.

Entry math. There are several ways in. The non-guaranteed drawing (lottery) is the cheapest path but uncertain — for the 2026 race the application window ran October 21 to November 18, 2025, with drawing results announced December 11, 2025. The time-qualifier path is a true guarantee if you hit the standard (unlike Boston, there is no fastest-first cutoff). The 2026 headline benchmarks are 2:50:00 for men 16–34 and 3:20:00 for women and non-binary 16–34, with slower standards for older age groups; the qualifying result must come from a certified full marathon. Other guaranteed routes include the legacy program (five-plus finishes in 10 years), official charity, and the international tour operator program. The entry fee is $250 for US residents and $260 internationally. The 2025 race set an attendance record with 54,351 finishers, and the 2026 field is expected to be similar. If a fast flat course is what you want, see how your goal compares to the qualifying tiers with our Boston Qualifier & Good For Age tool.

Training in Chicago

Arriving early? Explore daily running routes and local tips.

Prepare for 2026 Chicago Marathon - Oct 11

Use our free training tools to get race-ready:

View all running tools

Featured In

Easiest Boston Qualifying Marathons 2027 Best Marathons for Perfect Racing Weather in 2026 Flattest Marathons 2026 Best Marathons for Charity Running in 2026 Best Fall Marathons in 2026 (Sep-Nov) Best Marathons for Running Sub-3 Hours in 2026 Best Marathons for Female Runners in 2026 Best Marathons for Running Groups & Clubs in 2026

Chicago Marathon Comparisons

Show all comparisons (7) ↓

Frequently Asked Questions

When is the 2026 Chicago Marathon and what time does it start?

The 48th Bank of America Chicago Marathon is on Sunday, October 11, 2026. It uses three start waves: the first mass wave begins at 7:30 a.m. Central Time (Corrals A–E, behind the elite and professional fields), Wave 2 at 8:00 a.m., and Wave 3 at 8:35 a.m. The professional runners start at 7:30 a.m., with the pro wheelchair race going off a few minutes earlier. Your wave and corral are assigned by your expected finish time, so faster runners start earlier.

Is the Chicago Marathon really flat, and how much climbing is there?

Yes — it is one of the flattest Major courses, second only to Berlin by most accounts. Net elevation change across the full 26.2 miles is roughly zero. There is just one notable hill: 'Mount Roosevelt,' the bridge over Roosevelt Road near mile 26, which climbs about 25 feet in the final half-mile before a short downhill to the finish. Everything else is flat city pavement, which is exactly why the course produces so many fast times and world records.

Why does my GPS watch read long on the Chicago course?

Downtown Chicago's skyscrapers create 'urban canyons' that block and reflect GPS signals, with the worst interference in miles 1–5 and 24–26. This makes watches measure extra distance — many runners finish with 26.4 to 26.8 miles recorded, and the error in the first mile alone can be around 0.4 miles. The course is certified at exactly 26.2 miles along a painted blue tangent line, so trust that line, the official mile markers, and your effort rather than your watch's pace field. Budgeting for a long-reading watch keeps the final miles from panicking you.

Does the Chicago Marathon run along the lakefront, and how bad is the wind?

No — despite the 'Windy City' reputation, this is an inland downtown and neighborhoods street course, not a lakefront run. The race was historically barred from the parks and the Lake Michigan shoreline path; the early miles only run loosely parallel to the lake, which is mostly not visible. Average race wind is a modest 6–10 mph, and the surrounding buildings shelter you for much of the route. A westerly or northwesterly flow brings crosswinds and a headwind around miles 13–15, while a southerly flow gives a tailwind on the northbound opening and closing miles.

Is the Chicago Marathon a good course for a PR or world record?

It is one of the best PR courses anywhere. The combination of flat, firm pavement, wide roads, big crowds, and typically cool October weather has produced multiple world records. The women's marathon world record — Ruth Chepngetich's 2:09:56, set in Chicago in October 2024 — still stands as the world and course record, and the men's course record is Kelvin Kiptum's 2:00:35 from 2023. In 2025, Conner Mantz ran 2:04:43 here to break a long-standing US men's record. The one caveat is heat: Chicago is on average the warmest Major, so a cool day is fast and a warm one is not.

How do I get into the 2026 Chicago Marathon — lottery or qualifying time?

There are several paths. The non-guaranteed drawing (lottery) is the cheapest but uncertain — the 2026 application window ran October 21 to November 18, 2025, with results announced December 11, 2025. A guaranteed time-qualifier entry is a true guarantee if you hit the standard (unlike Boston, there is no fastest-first cutoff): the 2026 benchmarks are 2:50:00 for men 16–34 and 3:20:00 for women and non-binary 16–34, with slower times for older groups, from a certified full marathon. Other guaranteed routes are the legacy program (five-plus finishes in 10 years), official charity, the Chicago Distance Series, and the international tour operator program.

What does the Chicago Marathon cost and how big is the field?

The 2026 entry fee is $250 for United States residents and $260 for international runners, with an optional refundable registration insurance add-on of about $50. The 2025 race set an event attendance record with 54,351 finishers, up from 52,150 in 2024, and the 2026 field is expected to be similar; no official 2026 cap was published in the registration materials. Note that all entry fees are non-refundable, and a 'deferral' is effectively a cancellation that secures a guaranteed spot the following year rather than a postponement of the same entry.

What is the time limit for the Chicago Marathon?

The course time limit is 6 hours 30 minutes, which works out to roughly a 15-minute-per-mile pace. It is measured by net time from when you cross the start line, not gun time, so later corrals are not penalized for the wait. An event vehicle follows the final starter at that 15-minute-per-mile pace and signals when each segment reopens to traffic; runners who fall behind it may be moved to the sidewalks, lose full aid-station support, and may not be recorded as official finishers. The free official Pace Team runs groups from 2:55 all the way to 6:00 to help you stay ahead of the cutoff.

More Marathon Countdowns

View all marathons