Connecticut · 10K
10K Races in Connecticut
Connecticut currently has 14 upcoming 10Ks with a confirmed date listed in RaceRove. Simsbury, Bloomfield, Danbury and Fairfield have the largest concentration of events.
April (4), November (4) and May (2) are the busiest months on the calendar right now. Another 12 annual 10Ks are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 14
- Active listings
- 26
- Cities with races
- 24
More ways to browse Connecticut
Upcoming 10Ks in Connecticut
All 14 with a confirmed date, soonest first.
Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.
Largest 10K 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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Tackle the Trail (TM)Northeast, CT Usually held in October · next date not announced10K5K ~2,370 runners
When 10Ks happen in Connecticut
- April
- 4 upcoming races
- May
- 2 upcoming races
- June
- 2 upcoming races
- August
- 1 upcoming race
- October
- 1 upcoming race
- November
- 4 upcoming races
Connecticut cities with the most 10Ks
- Simsbury
- 2 upcoming races
- Bloomfield
- 1 upcoming race
- Danbury
- 1 upcoming race
- Fairfield
- 1 upcoming race
- Granby
- 1 upcoming race
- Middletown
- 1 upcoming race
- Mystic
- 1 upcoming race
- Norwich
- 1 upcoming race
Annual events awaiting their next date
These 10Ks 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
-
Tackle the Trail (TM)Northeast, CT Usually held in October · next date not announced10K5K ~2,370 runners
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Mohawk Mountain RaceCornwall, CT Usually held in October · next date not announcedMarathonHalf Marathon10K5K
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Montville Race Day 5K , 10K , and Color RunOakdale, CT Usually held in September · next date not announced5K10K
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Moosup Valley 5k, 8K and 10K All Trail RaceSterling, CT Usually held in September · next date not announced5K10K
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Newtown Community Running EventNewtown, CT Usually held in August · next date not announced50 Yards5K10K
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Norfolk Land Trust Trail Race Series/Haystack Mountain ChallengeNorfolk, CT Usually held in October · next date not announced5K10K
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OAH STRIDES Race and Family Fun DaySimsbury, CT Usually held in October · next date not announced5K10K1 Mile
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Suffield Parks & Recreation Road RaceSuffield, CT Usually held in September · next date not announced10K5K400m
10Ks 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.
- 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.
- 8 min read How to Train for Your First 10K A practical first-10K framework with easy running, one longer run, rest, and realistic progress.
- Blog All guides Planning advice for finding, choosing and travelling to races.
10K Races in Connecticut: common questions
- How many 10Ks are there in Connecticut?
- RaceRove currently lists 14 upcoming 10Ks in Connecticut with a confirmed date, plus 12 annual events whose next date hasn't been announced yet.
- How long is a 10K?
- A 10K is 6.2 miles (10 kilometres).
- Which Connecticut cities have the most 10Ks?
- By upcoming events listed in RaceRove: Simsbury (2), Bloomfield (1), Danbury (1), Fairfield (1) and Granby (1).
- When is 10K season in Connecticut?
- Of the upcoming 10Ks listed, the busiest months are April (4), November (4) and May (2).
- What is the biggest 10K in Connecticut?
- By estimated field size, the largest event with a 10K 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 10K 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.