Illinois Half Marathons

79 upcoming half marathons across Illinois, updated nightly. Want radius search and maps? Open these in the Race Finder.

When to race: half marathons in Illinois

Illinois has 79 upcoming half marathons over the next 12 months. October is the busiest month for them, with 16. Most are around Chicago, Greater Chicago, Elk Grove Village. The next one is Naperville Trails Half Marathon & 10K on September 5 in Wheaton.

September 2026

October 2026

November 2026

December 2026

January 2027

February 2027

March 2027

April 2027

May 2027

July 2027

August 2027

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More Illinois: Marathons · 5K Races · 10K Races · Ultras · All Illinois races · Browse by state