2025 Marathons

Illinois 2025 Marathons

Your complete Illinois 2025 marathon calendar. Find every marathon happening in Illinois in 2025 with comprehensive race details, registration information, and official results, including the Springfield Marathon (New Berlin), Spring Chance BQ.2 Marathon (Geneva), and Naperville Marathon (Naperville).

Each marathon listing includes a 2025 marathon guide including dates, locations, course details, weather conditions, and relevant links for registration and more information. We maintain the most current results database, publishing official results on race day, plus complete 2024 results for year-to-year comparison.

Springfield Marathon

New Berlin, Illinois

April 5, 2025

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The Springfield Marathon features a USATF-certified course that winds through New Berlin's scenic landscapes, offering a mostly flat terrain with gentle, rolling hills that appeal to those seeking a Boston qualifier. Held in November, the race provides ideal running conditions with cooler temperatures, a close-knit atmosphere, and versatile race options, making it a compelling choice for both seasoned marathoners and first-timers.

Naperville Marathon

Naperville, Illinois

April 13, 2025

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The Naperville Marathon offers a scenic and challenging course with a notable 305-foot elevation gain, weaving through vibrant city streets and serene natural landscapes, including picturesque areas like the Herrick Lake Forest Preserve. Starting and finishing at North Central College Benedetti–Wehrli Stadium, this USATF-certified race combines strong community support and a welcoming atmosphere, making it an ideal event for both seasoned marathoners and newcomers seeking a memorable running experience.

Chicagoland Spring Marathon

Schaumburg, Illinois

May 4, 2025

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The Chicagoland Spring Marathon offers a scenic and flat course, beginning in Schaumburg’s vibrant business district and winding through the serene landscapes of Busse Woods, complete with lakes, forests, and even an elk pasture. This USATF-certified event is perfect for those aiming for personal bests or Boston Marathon qualifications, enhanced by ideal weather and celebrated with local favorites like Giordano's pizza at the finish line.

Heartland Series Marathon - IL

Fulton, Illinois

July 15, 2025

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The Heartland Series Marathon in Fulton, Illinois, challenges runners with its unique 16-lap course on smooth asphalt, starting near the iconic Windmill Cultural Center and offering minimal elevation gain for those seeking speed. As part of a multi-state series along the picturesque Upper Mississippi River Valley, this intimate race fosters a close-knit community atmosphere, perfect for runners looking to test their endurance while enjoying the charm of a small-town setting.

Fox Valley Marathon

St. Charles, Illinois

September 21, 2025

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The Fox Valley Marathon takes runners on a scenic journey through the charming towns of St. Charles, Geneva, and Batavia, following the picturesque Fox River on a mostly flat course with just a few gentle inclines. Known for its small race atmosphere and big race amenities, this event offers a supportive, family-friendly environment with multiple race options, making it a perfect choice for both seasoned marathoners and newcomers.

Quad Cities Marathon

Moline, Illinois

September 28, 2025

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The Quad Cities Marathon offers a scenic 26.2-mile course that uniquely weaves through four cities and two states, featuring breathtaking views of the Mississippi River and three iconic bridges. This USATF-certified Boston Qualifier is more than a race; it's a vibrant celebration complete with live entertainment, strong community support, and a variety of events that create an unforgettable experience for runners of all levels.

Tunnel Hill Marathon

Vienna, Illinois

November 8, 2025

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The Tunnel Hill Marathon takes runners on a breathtaking tour of the Tunnel Hill State Trail in southern Illinois, featuring a fast, predominantly crushed rock path with a gentle 2% grade and the iconic 600-foot Tunnel Hill Tunnel. Known for its Boston Qualifying potential, this USATF/IAAF certified race offers a unique blend of road and trail running amidst stunning fall scenery, enhanced by the camaraderie of concurrent ultra-running events.