Connecticut · Marathon
Marathons in Connecticut
Connecticut currently has 1 upcoming marathon with a confirmed date listed in RaceRove. It takes place in Danbury.
Another 8 annual marathons are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 1
- Active listings
- 9
- Cities with races
- 4
More ways to browse Connecticut
Upcoming marathons in Connecticut
All 1 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 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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NipMuck Trail MarathonAshford, CT Usually held in October · next date not announcedMarathonMarathon Relay ~180 runners
Annual events awaiting their next date
These 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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NipMuck Trail MarathonAshford, CT Usually held in October · next date not announcedMarathonMarathon Relay ~180 runners
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Iron Hike - Fall Answer the Bell Ultra Trail Marathon - Basic (Backyard Ultra Format) - 28+ Miles | 14,400'+ Elevation | 24-Hour | Run, Hike or WalkCornwall, CT Usually held in October · next date not announcedMarathon61 Miles
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Iron Hike - Fall Denali Ultra Trail Marathon - 43+ Miles | 20,825' Elevation | 48-Hour | Run, Hike or WalkCornwall, CT Usually held in October · next date not announcedMarathon43 Miles
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Iron Hike - Fall Everest / 29029 Everesting Ultra Trail Marathon - 61+ Miles | 29,029'+ Elevation | 72-Hour | Run, Hike or WalkCornwall, CT Usually held in October · next date not announcedMarathon61 Miles
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Iron Hike - Fall Olympus Mons Ultra Trail MarathonCornwall, CT Usually held in October · next date not announcedMarathon152 Miles
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Mohawk Mountain RaceCornwall, CT Usually held in October · next date not announcedMarathonHalf Marathon10K5K
Marathons in nearby states
Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- 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.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Marathons in Connecticut: common questions
- How many marathons are there in Connecticut?
- RaceRove currently lists 1 upcoming marathon in Connecticut with a confirmed date, plus 8 annual events whose next date hasn't been announced yet.
- How long is a marathon?
- A marathon is 26.2 miles (42.2 kilometres).
- What is the biggest marathon in Connecticut?
- By estimated field size, the largest event with a 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 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.