Most runners who want to race Chicago do not have a guaranteed spot waiting for them. They go through the lottery, officially the race's non-guaranteed entry drawing. Understanding how that drawing actually works, separate from the other guaranteed-entry paths, makes the waiting a lot less stressful.

What the Chicago Marathon Lottery Actually Is

The lottery is a random drawing, not a first-come first-served signup and not a merit-based selection. You submit an application during a defined window, and once that window closes, names are drawn at random from the full applicant pool to fill whatever spots remain after every guaranteed-entry category has already been accounted for:

• Time qualifiers with a recent, verifiable qualifying marathon result
• Legacy entries for runners with a strong finishing history at Chicago itself
• Charity program runners fundraising for an official nonprofit partner
• International entries booked through an authorized tour operator

Submitting more than one application does not improve your odds. Race organizers remove duplicate entries before the draw is run, so there is no advantage to trying to game the system, and doing so risks disqualifying every application you submitted.

How the Application Window Works

The application window opens in the fall of the year before race day and stays open for several weeks before closing. You do not pay the entry fee up front to apply, the fee is only charged if your name is drawn, which is a meaningful difference from races that require payment at the time of entry. Exact opening and closing dates shift slightly from cycle to cycle, so check the official race website for the current window rather than assuming it matches a previous year.

What Your Odds Really Look Like

Chicago does not publish an exact acceptance rate, and outside estimates vary enormously, from roughly one in three down to closer to one in ten depending on the source and the year, which is itself a sign that no single published number should be trusted too far. What is safe to say is that your real odds depend heavily on how many of the total field spots have already been claimed by guaranteed-entry categories before the lottery pool is set in a given cycle, and that demand for the drawing has generally trended upward in recent years. Treat any specific percentage you see quoted online as a rough estimate from that source, not an official figure.

What Happens After You Apply

Once the application window closes, there is nothing more to do but wait. Chicago notifies both successful and unsuccessful applicants by email, typically within a few weeks of the window closing. If your name is drawn, the entry fee is charged automatically to the payment method on file rather than leaving you a separate window to opt in, so it is worth double-checking that your card details are current before the window closes and watching your email, including spam, around the notification date.

If You Are Not Selected: What Is Left

A lottery rejection is not the end of the road if Chicago is still the goal. The other guaranteed paths, fundraising through an official charity partner or booking through an authorized international tour operator, remain open on their own separate timelines, often for many months after the drawing results come out, and do not depend on the drawing at all. Many runners who miss the lottery one year simply apply again the next, since there is no penalty or reduced odds tied to a previous unsuccessful application. It is also worth revisiting your training and considering whether a documented qualifying time might be within reach before the next cycle opens, since that path sidesteps the lottery entirely.