Illinois Running Races

735 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 · Belleville · Lake Zurich · Springfield · Wheaton · Crystal Lake · Schaumburg · Elk Grove Village

Racing in Illinois: what the calendar looks like

There are 735 races on the Illinois calendar over the next 12 months, which works out to roughly 14 every weekend. September is the busiest month with 245 races; August is the quietest with 5. The busiest places to race are Chicago (80), Belleville (13), Lake Zurich (12).

Of those, 545 offer a 5K, 179 offer a 1 Mile and 125 offer a 10K. The next marathon is Belleville Main Street Marathon & Half Marathon on September 26 in Belleville. The next half marathon is Naperville Trails Half Marathon & 10K on September 5.

By race count Illinois ranks 9th of 51 states.

Races by month

Going deep on one race

Bank of America Chicago Marathon: fly the course in 3D

Fly the full course in 3D over real buildings, bridges and terrain, with the elevation profile, every named climb, and typical race day weather.

September 2026

October 2026

November 2026

December 2026

January 2027

February 2027

March 2027

April 2027

May 2027

June 2027

July 2027

August 2027

Planning a race

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