Illinois · Half Marathon
Half Marathons in Illinois
Illinois currently has 37 upcoming half marathons with a confirmed date listed in RaceRove. Chicago, Elk Grove Village, Champaign and Crystal Lake have the largest concentration of events.
October (7), November (7) and September (5) are the busiest months on the calendar right now. Another 20 annual half marathons are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 37
- Active listings
- 57
- Cities with races
- 25
More ways to browse Illinois
Upcoming half marathons in Illinois
All 37 with a confirmed date, soonest first.
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Springfield Marathon & Harvest Wind Half Marathon & 10KNew Berlin, ILMarathonHalf Marathon10K ~1,403 runners
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Chicagoland Spring Marathon, Half Marathon & 10KSchaumburg, ILMarathonHalf Marathon10K ~6,000 runners
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Heatwave Half Marathon - Greater ChicagoElk Grove Village, ILHalf Marathon50m1 Mile5K +1 more ~10 runners
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Golden Harvest Half Marathon & 5k/10k - Greater ChicagoGreater Chicago, ILHalf Marathon50m1 Mile5K +1 more ~10 runners
Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.
Largest half marathon events in Illinois
By estimated field size across all distances at the event.
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Long Grove's Oktoberfest Half Marathon, 10K & 5KLong Grove, IL Usually held in October · next date not announcedHalf Marathon5K10K ~9,000 runners
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Chicagoland Spring Marathon, Half Marathon & 10KSchaumburg, ILMarathonHalf Marathon10K ~6,000 runners
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Naperville Half MarathonNaperville, IL Usually held in October · next date not announcedHalf Marathon10K5K ~6,000 runners
When half marathons happen in Illinois
- January
- 3 upcoming races
- February
- 4 upcoming races
- April
- 3 upcoming races
- May
- 2 upcoming races
- June
- 1 upcoming race
- July
- 1 upcoming race
- August
- 1 upcoming race
- September
- 5 upcoming races
- October
- 7 upcoming races
- November
- 7 upcoming races
- December
- 3 upcoming races
Illinois cities with the most half marathons
- Chicago
- 21 upcoming races
- Elk Grove Village
- 2 upcoming races
- Champaign
- 1 upcoming race
- Crystal Lake
- 1 upcoming race
- Galena
- 1 upcoming race
- Geneva
- 1 upcoming race
- Greater Chicago
- 1 upcoming race
- Lake County
- 1 upcoming race
Running in Illinois cities
Annual events awaiting their next date
These half marathons are held every year, but the next date isn't in the listing yet. The month shown is when each is usually held.
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Long Grove's Oktoberfest Half Marathon, 10K & 5KLong Grove, IL Usually held in October · next date not announcedHalf Marathon5K10K ~9,000 runners
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Naperville Half MarathonNaperville, IL Usually held in October · next date not announcedHalf Marathon10K5K ~6,000 runners
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TBK Bank Quad Cities MarathonMoline, IL Usually held in September · next date not announcedGroup O 5KGroup O 5k + Shoes for Kids MileHappy Joe's Kids Micro-MarathonMel Foster Co. Half Marathon +1 more ~563 runners
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Belleville Main Street Marathon & Half MarathonBelleville, IL Usually held in September · next date not announcedMarathonHalf Marathon10K5K ~175 runners
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Bagel Run 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in August · next date not announcedHalf Marathon5K10K1 Mile
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Chicago Fall Classic Half Marathon, 10K & 5KChicago, IL Usually held in October · next date not announcedHalf Marathon5K10K
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Farmdale Trail RunEast Peoria, IL Usually held in October · next date not announced100 Miler50 Miler30 Miler1/2 Marathon +1 more
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Moraine Hills Run for the HillsMcHenry, IL Usually held in September · next date not announced10K Run10K Run / Walk VIRTUAL10K Walk5K Run / Walk +3 more
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National Chocolate Day: Run for Chocolates 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in September · next date not announcedHalf Marathon5K10K1 Mile
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Oktoberfest Run 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in September · next date not announcedHalf Marathon5K10K1 Mile
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RAMP River Run – 3K, 5K, & 1/2 Marathon RunRockford, IL Usually held in August · next date not announcedHalf Marathon5K3K
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Run for Breast Cancer 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in August · next date not announcedHalf Marathon5K10K1 Mile
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Run for Coffee Lovers 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in July · next date not announcedHalf Marathon5K10K1 Mile
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Run for Donuts 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in July · next date not announcedHalf Marathon5K10K1 Mile
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Run for Mental Health 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in September · next date not announcedHalf Marathon5K10K1 Mile
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Run for PB& J 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in August · next date not announcedHalf Marathon5K10K1 Mile
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Screaming PumpkinPeoria, IL Usually held in October · next date not announced2 Mile Run/Walk6.55 Mile (10kish) - RaceFull MarathonHalf Marathon +2 more
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Sloth Run 5K/10K/13.1 CHICAGO/EVANSTONChicago, IL Usually held in August · next date not announcedHalf Marathon5K10K1 Mile
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The Hidden Gem Half MarathonFlossmoor, IL Usually held in September · next date not announcedHalf Marathon
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The Next Loop Endurance Series - Busse WoodsElk Grove Village, IL Usually held in August · next date not announced50KMarathon18KHalf Marathon +3 more
Half Marathons in nearby states
Guides from the RaceRove blog
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Half Marathons in Illinois: common questions
- How many half marathons are there in Illinois?
- RaceRove currently lists 37 upcoming half marathons in Illinois with a confirmed date, plus 20 annual events whose next date hasn't been announced yet.
- How long is a half marathon?
- A half marathon is 13.1 miles (21.1 kilometres).
- Which Illinois cities have the most half marathons?
- By upcoming events listed in RaceRove: Chicago (21), Elk Grove Village (2), Champaign (1), Crystal Lake (1) and Galena (1).
- When is half marathon season in Illinois?
- Of the upcoming half marathons listed, the busiest months are October (7), November (7) and September (5).
- What is the biggest half marathon in Illinois?
- By estimated field size, the largest event with a half marathon listed in Illinois is the Rock ‘n’ Roll Chicago Half, with about 12,000 runners across all of its distances.
Search every half marathon in Illinois
Filter by month, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.