Question 1

How many marathons in Illinois are there in 2027?

Accepted Answer

There are 4 upcoming marathons in Illinois listed on 42Cal, from March 2027 through October 2027. The count updates automatically as races are added.

Question 2

When is the best time for marathons in Illinois?

Accepted Answer

Most of the 6 races on this list (4 of them) fall in March and April and September.

Question 3

Which race in this list has the least elevation gain?

Accepted Answer

Christie Clinic Illinois Marathon in Champaign is the flattest race on this list, with about 85 ft of total elevation gain — based on the 6 of 6 races here with elevation data on file.

Question 4

How current is this list?

Accepted Answer

This list was last refreshed on November 11, 2026. Race dates, locations, and course details are updated continuously as organizers confirm changes, so this page reflects the calendar as of that date.

Race	Date	Location	Distance	Elevation	Status
Rend Lake Marathon	March 2027	Benton, United States	Marathon	150 m	Registration Open
Christie Clinic Illinois Marathon	April 2027	Champaign, United States	Marathon	85 ft	Registration Open
Starved Rock Country Marathon	May 2027	Ottawa, United States	Marathon	130 m	Registration Open
Bank of America Chicago Marathon	October 2027	Chicago, United States	Marathon	150 ft	Registration Closed
TBK Bank Quad Cities Marathon	September 2026	Moline, United States	Marathon	518 ft	completed
Fox Valley Marathon	September 2026	St. Charles, United States	Marathon	152 m	completed

Marathons in Illinois 2027

Upcoming Marathons in Illinois 2027

Rend Lake Marathon

Christie Clinic Illinois Marathon

Starved Rock Country Marathon

Bank of America Chicago Marathon

Recently Run

TBK Bank Quad Cities Marathon

Fox Valley Marathon

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