The Chicago Marathon is one of the most famous marathon races in the world, attracting runners from across the globe to the streets of Chicago. Whether you're chasing a personal best, preparing for your first marathon, or simply looking to experience one of the world's biggest running events, Chicago offers an unforgettable race-day experience.
With a fast, relatively flat course, huge crowds, and a spectacular city setting, the Chicago Marathon has become a favorite among both competitive and recreational runners.
In this guide, we'll cover the most important things you need to know about the Chicago Marathon, including the race date, registration, qualifying standards, course, training, and practical race-day tips.
When Is the Chicago Marathon?
The Bank of America Chicago Marathon traditionally takes place on the second Sunday of October. The 2026 Chicago Marathon is scheduled for Sunday, October 11, 2026, while the 2027 race is scheduled for Sunday, October 10, 2027.
October can provide excellent conditions for marathon running, but weather can vary. Runners should be prepared for different temperatures and conditions and check the official race information as race day approaches.
How to Register for the Chicago Marathon
There are several ways to gain entry to the Chicago Marathon. Runners may be able to receive guaranteed entry through qualifying times, charity programs, official tour operators, and other designated entry opportunities. Another option is to apply through the non-guaranteed drawing.
For the 2027 Chicago Marathon, applications are scheduled to open at 8 a.m. U.S. Central Time on Thursday, October 8, 2026, with the application period running through October 29.
Because registration dates and entry requirements can change from year to year, runners should always check the official Chicago Marathon website for the latest information before making travel plans.
Chicago Marathon Qualifying Times
One of the most popular ways to obtain guaranteed entry is by running a qualifying marathon time. The required time depends on your age and gender, and the standards become more generous as runners move into older age groups.
For the 2027 Chicago Marathon, qualifying standards include 2:50:00 for men ages 16–34 and 3:20:00 for women ages 16–34. The standards gradually increase for older age groups.
For example, runners ages 40–44 need a time of 3:00:00 for men or 3:30:00 for women, while runners ages 60–64 need 3:40:00 for men or 4:15:00 for women.
The qualifying marathon must be completed during the official qualifying window and must be run on a certified course. Half-marathon and other race results cannot be used as a substitute for the marathon qualifying requirement.
The Chicago Marathon Course
The Chicago Marathon course starts and finishes in Grant Park and takes runners through 29 Chicago neighborhoods. The route is famous for being relatively flat, making it an attractive course for runners who want to pursue a personal best.
One of the biggest highlights is the incredible crowd support. Approximately 1.7 million spectators line the course, creating an energetic atmosphere that can help motivate runners throughout the 26.2 miles.
The course doesn't have the major climbs found in some other famous marathons, but that doesn't mean Chicago is easy. The biggest challenge for many runners is maintaining a consistent pace while managing fatigue, weather, fueling, and the excitement of race day.
How Long Is the Chicago Marathon?
Like every standard marathon, the Chicago Marathon is 26.2 miles, or approximately 42.2 kilometers.
The official course time limit is 6 hours and 30 minutes, which is approximately a 15-minute-per-mile pace. Runners who fall behind the official pace may eventually be required to move onto the sidewalk as roads reopen to traffic.
If your main goal is simply to finish the race, it's still a good idea to train at a pace that gives you some margin above the official cutoff.
How to Train for the Chicago Marathon
Preparing for a marathon requires more than simply running long distances. A good training program should gradually develop your endurance, speed, strength, and recovery while helping you arrive at the starting line healthy.
The Chicago Marathon offers an official 18-week training plan developed with Nike coaches. An 18-week schedule provides enough time for runners to build mileage gradually while including long runs, faster workouts, recovery days, and other important training sessions.
Easy runs help develop your aerobic fitness while keeping training fatigue manageable. Long runs are important for building endurance, while tempo runs and intervals can help improve speed and running efficiency.
Strength training and rest are also important. Your body needs time to adapt to increasing training loads, so recovery should be treated as part of your marathon training rather than something you do only when you're tired.
Practice Your Marathon Fueling
Nutrition can play an important role in your Chicago Marathon performance. Long training runs provide an opportunity to test energy gels, sports drinks, carbohydrates, and hydration strategies before race day.
Don't wait until marathon morning to try something new. Your fueling strategy should be tested during training so you know what your stomach can tolerate and how frequently you need carbohydrates and fluids.
The goal is to arrive at race day with a nutrition strategy that feels familiar and predictable.
Don't Start Too Fast
One of the most common marathon mistakes is starting too quickly. The excitement of the Chicago Marathon, combined with the huge crowds and adrenaline of race morning, can make your opening miles feel easier than they actually are.
Try to stick to your planned pace during the early stages of the race. A controlled first half can leave you with much more energy for the final miles, when fatigue becomes a major factor.
Remember that a marathon is a long race. Saving some energy early can make a significant difference later.
Know Your Start Corral
The Chicago Marathon uses start corrals to organize runners and make the race start more efficient. Corrals are assigned based on factors such as qualifying times and expected finish times.
Before race morning, check your official start corral and make sure you know where you need to go. Give yourself plenty of time to reach the starting area, especially if you're unfamiliar with Chicago.
Avoid arriving at the last possible minute. A relaxed start to race morning can help you feel more comfortable before running 26.2 miles.
Pick Up Your Race Materials
Chicago Marathon participants must pick up their race materials at the Abbott Health & Fitness Expo. Your participant packet includes important race materials such as your bib number and timing device.
Participants should bring the required identification and make sure their information matches their registration details. It's a good idea to plan your Expo visit in advance rather than leaving it until the last possible opportunity.
Prepare for Chicago Weather
October weather in Chicago can be unpredictable, so it's important to have a flexible race-day plan. Temperatures can be comfortable for running, but conditions can also change considerably from one year to another.
Check the forecast during race week and choose your clothing accordingly. Avoid wearing too many layers simply because the morning feels cold, as you may become uncomfortable once you start running.
The Chicago Marathon also uses an Event Alert System to communicate information about course conditions and potential weather-related concerns.
Don't Overdo Race Week
Chicago is an incredible city to explore, but marathon runners should be careful not to spend the days before the race walking for hours. Seeing the sights can be part of the experience, but excessive walking can leave your legs tired before race morning.
Try to organize your sightseeing earlier in the week and keep the final day before the marathon relatively relaxed. Your goal is to arrive at the starting line feeling rested and ready.
Break the Marathon Into Sections
Running 26.2 miles can feel overwhelming if you think about the entire distance at once. Breaking the race into smaller sections can make the challenge feel much more manageable.
The first section should be about settling into your rhythm. During the middle miles, focus on maintaining your pace and staying on top of your fueling. Once you reach the final stages, concentrate on maintaining good form and using the crowd support to keep moving forward.
Having smaller goals throughout the race can help you stay mentally focused, especially when fatigue begins to build.
What Should You Bring to Chicago?
Your packing list will depend on whether you're traveling locally or internationally, but marathon essentials should include running shoes you've already tested, comfortable race clothing, running socks, nutrition, identification, weather-appropriate layers, and comfortable clothes for after the race.
Most importantly, avoid introducing anything completely new on race day. Your shoes, clothing, nutrition, and other equipment should already have been tested during training.
Is the Chicago Marathon Good for a First Marathon?
The Chicago Marathon can be an excellent choice for a first marathon. The relatively flat course, enormous spectator support, and highly organized race environment make it appealing to runners of different experience levels.
The biggest challenge may be getting an entry and then preparing properly for the distance. Once you have your place, focus on building your fitness gradually rather than trying to do too much too quickly.
If you're running your first marathon, consistency is more important than completing every workout perfectly. Arriving at the start healthy and confident is far more valuable than trying to prove your fitness with an unnecessarily difficult training session.
Final Thoughts
The Chicago Marathon combines a fast course, incredible crowd support, and the unique atmosphere of one of America's greatest cities. Whether you're chasing a personal best or preparing for your first marathon, the race offers an experience that can stay with you long after you cross the finish line.
The key to a successful Chicago Marathon is preparation. Make sure you understand the registration process, train consistently, practice your fueling strategy, prepare for different weather conditions, and develop a realistic race-day pacing plan.
Most importantly, enjoy the experience. From the start in Grant Park to the final miles and the finish line, the Chicago Marathon is about much more than running 26.2 miles. It's about being part of one of the world's great running events.