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Marathons in Connecticut, United States

33 upcoming marathons listed in Connecticut across 2 cities. Next: Newtown Community Running Event on August 30, 2026.

33marathons upcoming
2cities
August 30, 2026Next race
Marathon, Half marathon, Ultra, 10K, 5K, RelayDistances
Newtown, Connecticut, United States
30AUG
ULTRA
Newtown Community Running Event
Newtown, Connecticut, United States
August 30, 2026 AUG
Connecticut, United States
31AUG
ULTRA
Faxon Law New Haven Road Race
Connecticut, United States
August 31, 2026 AUG
New Haven, Connecticut, United States
07SEP
21.1K
Faxon Law New Haven Road Race
New Haven, Connecticut, United States
September 7, 2026 SEP
Milford, Connecticut, United States
12SEP
21.1K
Gulf Beach Half Marathon
Milford, Connecticut, United States
September 12, 2026 SEP
West Suffield, Connecticut, United States
12SEP
ULTRA
The Cross-Connecticut Run for Mental Health Awareness
West Suffield, Connecticut, United States
September 12, 2026 SEP
Kent, Connecticut, United States
13SEP
ULTRA
Macedonia Trail Race
Kent, Connecticut, United States
September 13, 2026 SEP
Colebrook, Connecticut, United States
26SEP
21.1K
Hogsback Half Marathon
Colebrook, Connecticut, United States
September 26, 2026 SEP
Old Greenwich, Connecticut, United States
27SEP
21.1K
Greenwich Half Marathon
Old Greenwich, Connecticut, United States
September 27, 2026 SEP
Cornwall, Connecticut, United States
01OCT
ULTRA
Iron Hike - Fall Everest / 29029 Everesting Ultra Trail Marathon - 61+ Miles | 29,029'+ Elevation | 72-Hour | Run, Hike or Walk
Cornwall, Connecticut, United States
October 1, 2026 OCT
Cornwall, Connecticut, United States
02OCT
ULTRA
Iron Hike - Fall Denali Ultra Trail Marathon - 43+ Miles | 20,825' Elevation | 48-Hour | Run, Hike or Walk
Cornwall, Connecticut, United States
October 2, 2026 OCT
Cornwall, Connecticut, United States
03OCT
ULTRA
Iron Hike - Fall Kuwohi Trail Half Marathon Plus - 15 Miles | 7,140' Elevation | 12-Hour | Run, Hike or Walk
Cornwall, Connecticut, United States
October 3, 2026 OCT
Connecticut, United States
03OCT
ULTRA
IronHike Mohawk Mountain
Connecticut, United States
October 3, 2026 OCT
Norwalk, Connecticut, United States
04OCT
21.1K
Garavel SoNo Half Marathon | 5K
Norwalk, Connecticut, United States
October 4, 2026 OCT
Ashford, Connecticut, United States
04OCT
42.2K
NipMuck Trail Marathon
Ashford, Connecticut, United States
October 4, 2026 OCT
Norfolk, Connecticut, United States
04OCT
ULTRA
Norfolk Land Trust Trail Race Series/Haystack Mountain Challenge
Norfolk, Connecticut, United States
October 4, 2026 OCT
Norwalk, Connecticut, United States
06OCT
21.1K
Sono Half + 5K with myTEAM TRIUMPH
Norwalk, Connecticut, United States
October 6, 2026 OCT
Connecticut, United States
09OCT
ULTRA
Race For Catherine
Connecticut, United States
October 9, 2026 to October 11, 2026 OCT
Hartford, Connecticut, United States
10OCT
42.2K
Amica Hartford Marathon Connecticut
Hartford, Connecticut, United States
October 10, 2026 BQ Qualifier
Hartford, Connecticut, United States
10OCT
42.2K
Eversource Hartford Marathon
Hartford, Connecticut, United States
October 10, 2026 BQ Qualifier
Cornwall, Connecticut, United States
11OCT
42.2K
Mohawk Mountain Race
Cornwall, Connecticut, United States
October 11, 2026 OCT
Northeast, Connecticut, United States
17OCT
ULTRA
Tackle the Trail (TM)
Northeast, Connecticut, United States
October 17, 2026 OCT
Ridgefield, Connecticut, United States
18OCT
42.2K
The Ridgefield Road Fest 50th ANNIVERSARY: 1/2 Marathon, 7-Miler, & Iris Fund 5K
Ridgefield, Connecticut, United States
October 18, 2026 OCT
WESTON, Connecticut, United States
25OCT
21.1K
Reservoir Run Half Marathon, 5K, Kids Fun Runs & Family Stroll
WESTON, Connecticut, United States
October 25, 2026 OCT
Roxbury, Connecticut, United States
14NOV
ULTRA
Roxbury Fall Classic
Roxbury, Connecticut, United States
November 14, 2026 NOV

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Cities

Place Marathons
Hartford 1
Hartford 1

Planning notes for Connecticut, United States

Use this region page to shortlist 33 upcoming races by date, distance, registration path, and official source.

  • Next raceNewtown Community Running Event on August 30, 2026
  • Busy monthsOctober (15), September (6), November (5)
  • DistancesMarathon, Half marathon, Ultra, 10K, 5K, Relay
  • VerifyOpen each race page, then confirm details from its official, registration, course-map, or source link.

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