Illinois Running Races

489 upcoming races across Illinois in the next 12 months, from local 5Ks to marathons and ultras. Updated nightly. Want filters, maps, and radius search? Open Illinois in the Race Finder.

By distance: Marathons · Half Marathons · 5K Races · 10K Races · Ultras

By city: Chicago · Springfield · Lake Zurich · Crystal Lake · Wheaton · Peoria

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Racing in Illinois: what the calendar looks like

There are 489 races on the Illinois calendar over the next 12 months, which works out to roughly 9 per week. Among complete calendar months, December 2026 has the most listed races (73); July 2027 has the fewest (17). The busiest places to race are Chicago (57), Springfield (12), Lake Zurich (11).

Of those, 352 offer a 5K, 120 offer a 1 Mile and 100 offer a 10K. The next marathon is Tunnel Hill on November 14 in Vienna. The next half marathon is Run for Mental Health 5K/10K/13.1 CHICAGO/EVANSTON on November 14.

By race count Illinois ranks 11th of 51 states and DC.

Races by month

Going deep on one race

Bank of America Chicago Marathon: the complete guide

The course mile by mile, where to stay near the start, the expo, where to watch, and the whole race weekend planned out.

Bank of America Chicago Marathon: the course, mile by mile

The elevation profile, every named climb, mile by mile grades, a route map and typical race day weather.

November 2026

December 2026

January 2027

February 2027

March 2027

April 2027

May 2027

June 2027

July 2027

August 2027

September 2027

October 2027

November 2027

Planning a race

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