raceIQ

Marathons in Illinois

14 upcoming marathons in Illinois, with dates and field depth before you enter.

All races5K races 35810K races 97Half marathons 59Marathons 14Ultramarathons 6 Races near me
Most competitive fields

Ranked by how fast the front of the field ran in recent editions, compared with every race we track at that distance.

  1. 1Rend Lake MarathonSat, Mar 27BentonMarathon Very competitive
  2. 2Stone Bridge Half Marathon and 5kSat, Sep 25Roscoe5KMarathon Competitive
  3. 3Spring Chance BQ.2 MarathonSun, Apr 11GenevaMarathon Competitive
  4. 4Bank of America Chicago Marathon Sun, Oct 10ChicagoMarathon Competitive
  5. 5Chicagoland Spring Marathon, Half Marathon & 10KSun, May 2Schaumburg10KHalf marathonMarathon Local

Which of these could you place in? raceIQ ranks them by where your pace would finish, in your age group and gender.

Find your races

November 2026

March 2027

April 2027

May 2027

July 2027

September 2027

October 2027