Connecticut · Half Marathon
Half Marathons in Connecticut
Connecticut currently has 12 upcoming half marathons with a confirmed date listed in RaceRove. They take place in Bristol, Danbury, Fairfield and Litchfield and elsewhere.
November (3), May (2) and June (2) are the busiest months on the calendar right now. Another 7 annual half marathons are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 12
- Active listings
- 19
- Cities with races
- 18
More ways to browse Connecticut
Upcoming half marathons in Connecticut
All 12 with a confirmed date, soonest first.
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Athletic Brewing Company Fairfield Road RacesFairfield, CTHalf Marathon5KLucas Challenge (Half + 5K)Beer Mile +1 more ~5,000 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 Connecticut
By estimated field size across all distances at the event.
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Eversource Hartford Marathon, Half Marathon, Relay & Charity 5KHartford, CT Usually held in October · next date not announcedMarathonHalf Marathon10K5K ~10,000 runners
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Hartford MarathonHartford, CT Usually held in October · next date not announcedMarathonHalf5K ~10,000 runners
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Reservoir Run Half Marathon, 5K, Kids Fun Runs & Family StrollWeston, CT Usually held in October · next date not announcedHalf Marathon5K1K ~8,517 runners
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Athletic Brewing Company Fairfield Road RacesFairfield, CTHalf Marathon5KLucas Challenge (Half + 5K)Beer Mile +1 more ~5,000 runners
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Hogsback Half MarathonColebrook, CT Usually held in September · next date not announcedHalf Marathon5K ~1,435 runners
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HSS Greenwich Half MarathonOld Greenwich, CT Usually held in September · next date not announcedHalf Marathon ~1,080 runners
When half marathons happen in Connecticut
- January
- 1 upcoming race
- April
- 1 upcoming race
- May
- 2 upcoming races
- June
- 2 upcoming races
- July
- 2 upcoming races
- October
- 1 upcoming race
- November
- 3 upcoming races
Connecticut cities with the most half marathons
- Bristol
- 1 upcoming race
- Danbury
- 1 upcoming race
- Fairfield
- 1 upcoming race
- Litchfield
- 1 upcoming race
- Madison
- 1 upcoming race
- Mystic
- 1 upcoming race
- New London
- 1 upcoming race
- Norwalk
- 1 upcoming race
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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Eversource Hartford Marathon, Half Marathon, Relay & Charity 5KHartford, CT Usually held in October · next date not announcedMarathonHalf Marathon10K5K ~10,000 runners
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Hartford MarathonHartford, CT Usually held in October · next date not announcedMarathonHalf5K ~10,000 runners
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Reservoir Run Half Marathon, 5K, Kids Fun Runs & Family StrollWeston, CT Usually held in October · next date not announcedHalf Marathon5K1K ~8,517 runners
-
Hogsback Half MarathonColebrook, CT Usually held in September · next date not announcedHalf Marathon5K ~1,435 runners
-
HSS Greenwich Half MarathonOld Greenwich, CT Usually held in September · next date not announcedHalf Marathon ~1,080 runners
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The Ridgefield Road Fest 50th Anniversary: 1/2 Marathon, 7-Miler, and Iris Fund 5KRidgefield, CT Usually held in October · next date not announcedHalf Marathon5K7 Miles ~500 runners
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Mohawk Mountain RaceCornwall, CT Usually held in October · next date not announcedMarathonHalf Marathon10K5K
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 Connecticut: common questions
- How many half marathons are there in Connecticut?
- RaceRove currently lists 12 upcoming half marathons in Connecticut with a confirmed date, plus 7 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 Connecticut cities have the most half marathons?
- By upcoming events listed in RaceRove: Bristol (1), Danbury (1), Fairfield (1), Litchfield (1) and Madison (1).
- When is half marathon season in Connecticut?
- Of the upcoming half marathons listed, the busiest months are November (3), May (2) and June (2).
- What is the biggest half marathon in Connecticut?
- By estimated field size, the largest event with a half marathon listed in Connecticut is the Eversource Hartford Marathon, Half Marathon, Relay & Charity 5K, with about 10,000 runners across all of its distances.
Search every half marathon in Connecticut
Filter by month, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.